Re: NT Service handling (was: bad review)

[Michael]

I have installed the latest client on a number of Win2k machines.

On about half it works and on the other half it does not work. They are all
same regarding instll, etc. They all have basic Win2k not service packs.
Trying to use IE version 5.5+.

Any help appreciated.

Michael



- Original Message -
From: "Andrew van der Stock" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, September 18, 2001 11:59 PM
Subject: NT Service handling (was: bad review)


> This is because VNC does not use NT service dependancies and uses a
> simplistic SCM handler, and thus is started last and terminated first.
> Changing things so that VNC relies on some of the other services will
> allow it to start a little quicker as well.
>
> For a long surviving shutdown, the best bet is to change the service
> control handler in WinVNC. When the SCM issues a SERVICE_ACCEPT_SHUTDOWN
> message, you clean up resources that can be damaged across a reboot (ie
> flush and close any open files and registry handles), and then issue a
> message called "SERVICE_CONTROL_PENDING" with 30 seconds set aside in
> dwWaitHint and return control to the SCM.
>
> During the shutdown, SCM ignores the pending status and WinVNC will get
> terminated as the box goes down just before reboot. However, if you get
> asked again (during a long shutdown, typical of Exchange servers, etc),
> just set another 30 seconds in dwWaitHint and reset the pending hint.
>
> WinVNC after doing this should *not* try to use any of the previously
> open files or registry keys; if the user is able to stop the shutdown
> and tries to change VNC settings or re-authenticate, VNC should display
> a dialog stating along the lines of "a shutdown did not occur properly,
> and should it restart VNC?".
>
> Andrew
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of Tony Caduto
> Sent: Wednesday, 19 September 2001 04:14
> To: [EMAIL PROTECTED]
> Subject: Re: Bad Review of VNC at CNET
>
>
> Another big problem that needs to be addressed is the fact that VNC when
> run as a service shuts down before everything, so if something hangs
> after VNC shuts down, you can never restart the server unless you
> physically go the machine.
>
> Tony Caduto
>
> - Original Message -
> From: "David Brodbeck" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, September 18, 2001 7:42 AM
> Subject: RE: Bad Review of VNC at CNET
>
>
> > I'll second this...would it really be that much extra work to add
> > dialog
> box
> > controls for some of those registry keys?  Or maybe just a stand-alone
>
> > configuration utility?  Even editing a flat configuration file would
> > be easier than having to dive into Microsoft's hellish registry
> > structure. ;)
> >
> > -Original Message-
> > From: Andrew van der Stock [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, September 17, 2001 10:18 PM
> > To: [EMAIL PROTECTED]
> > Subject: RE: Bad Review of VNC at CNET
> >
> >
> > Documentation could be improved, particularly for first time users.
> > Dialog boxes could be better from a purist HCI point of view Security
> > can be made easier (particularly the hidden AuthHost stuff)
> > Localization could be done properly
> > -
> > To unsubscribe, send a message with the line: unsubscribe vnc-list to
> > [EMAIL PROTECTED] See also:
> > http://www.uk.research.att.com/vnc/intouch.html
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can not connect to VNC

[Michael]

I have installed the latest client on a number of Win2k machines.

On about half it works and on the other half it does not work. They are all
same regarding instll, etc. They all have basic Win2k not service packs.
Trying to use IE version 5.5+.

Also, let me clarify, I can connect but when I enter the correct password
(yes it is correct) I get a message stating that VNC does not have a valid
password enabled. Until a password is set, incoming connections cannot be
accepted. I am getting this on about 12 machines out of maybe 35. Same
software, on either Win2k or NT 4. There does not seem to be any same
variables either.

Any help appreciated.
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Modem connection

[Michael]

Hi all,
I am running a server with SBS 5.5.
The machine has a ISDN modem attached to it for mail and internet access.
I have also set up remote access on the server.
everything was working fine till i installed vnc 3.3.9.
The fault i am having is that VNC causes the modem to connect every +- 13
seconds even though VNC is not been used.If i stop the VNC service the machine
is fine (modem does not dial out)
Any suggestions?

Regards
Michael le roux
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Re: DOS version

[Michael]

At 04:35 PM 12/29/2000 +0100, you wrote:
>DOS
>Marinos J. Yannikos <[EMAIL PROTECTED]> has written a VNC viewer which runs
>under DOS, using packet drivers and the Waterloo TCP/IP library along with
>the Allegro graphics library. The whole system including the IP stack fits
>comfortably on a floppy disk. You can get it from here. .
>
>Is there also a server version available somewhere ?
>
>Regards, and a happy New Year !
>
>Dries Feys-Software Engineer
>TVH forklift parts-Thermote & Vanhalst NV

I'd also like to know if there's a server available. I know this may be a 
question without a solution, because the faqs say there isn't a server for 
Win 3.11 but if anyone could suggest a solution, VNC or alternative, I'd be 
grateful.

I have an old 486 running WFWG 3.11 which I'm aiming to use as a print 
server for a home network and for backup of data files off other machines 
onto it's hard drive. At the moment it's running with a monitor attached, 
as I have to exit Windows gracefully to avoid corrupt files rather than 
just giving it a three finger salute. Also I occasionally have to review 
the screen. It's an awful waste of a monitor which I'd rather transfer to 
another machine for the kids. The other machines on the network are Win98SE 
but I don't think the 486 is up to Win 95/98. I'd like to leave it running 
WFWG, which works, but have the ability to control it remotely and detach 
the monitor. A friend recommended VNC based on his experience at work but I 
seem to be too far behind the technological curve for it. I have mused 
about putting Linux or something on the 486 but so far I don't speak any 
version of *nix and I'm not sure if  the services would function properly 
with Win98.

Does anyone know of a potential solution, either with VNC or some other 
program?

Thanks,

Michael
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Re: Problems with my password.

[Michael]

I agree, except I'd put the odds even lower, an Amazonian animal researcher 
with a dedicated satellite link using a Yahoo ID? :-)

  What I would like to know though is just how difficult it is to crack 
into a VNC server. A friend of mine uses it to fix problems remotely for 
his family and I thought I could use it for the same purpose. However I 
don't want to recommend it to people who aren't particularly technical and 
computer security savvy if it's possible for hackers to easily break the 
security.

At 11:39 AM 02/03/2001 -0800, you wrote:
> >   I have an unexpected situation working with VNC. My job is
> > incredebly.
>
> Incredible indeed. Five gets you ten that someone just
>wants to know how to crack into a VNC server they know about.
>People should just *ask* without the elaborate cover story.
>
>-Scott
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Re: List clients

[Michael Duck]

You might check outhttp://www.chez.com/pag/vncmng.html.  It might be
what you are looking for.


Michael M. Duck
Telemetry Systems Networking
Tuolumne Utilities District
Sonora, California


- Original Message -
From: "LAFRANCE Richard -IT INFRSTRC" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, June 19, 2001 14:56
Subject: List clients


> Is there a way a user at the host can determine what client(s) are
connected
> (ie: list the IP addresses of any connected VNC clients)?
>
> Thanks
> Richard Lafrance
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RE: PC-Anywhere

[Michael Milette]

At 08:50 AM 2001-06-27 -0400, you wrote:
>Is there a good reason NT authentication couldn't be added to the Windows NT
>VNC server?  This seems like a pretty good idea.

See http://www.rabidpenguin.org/diversions.html by Jared Smolens. There you 
will find the WinVNC NT Auth Patches to 3.3.2R6. Authenticates against NT 
but unfortunately not against the NT domain.

Never actually tried it so I can't say if it works or not.

     Michael
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Re: Secure VNC sessions

[Michael Milette]

At 09:35 AM 2001-07-05 +0100, you wrote:
>I know win2000 server has a single user version of Terminal Server
>in it, but has XP had this expanded to include workstation too?

Yes, but only in the professional edition, not the personal edition.

     Michael
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Re: Secure windows to windows connections ???

[Michael Schaap]

At 05:59 9-7-2001, you wrote:
>ssh clients are no problem.  sshd servers are difficult to find for
>windows -- at least, not free ;<

Take a look at Cygwin - http://www.cygwin.com/
It's free, and comes with OpenSSH.

  - Michael
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Startx / X Windows question

[Michael Walker]

Hi all,

I have VNC server running okay on my SuSE box, and I can view the command
line display on my Windows box.

My question is, how - if possible, do you make VNC server run so that it
ties in with your X Windows GUI on Linux?

I'm assuming that you'd link it to "startx" or something similar, but not
100% sure.

Can anyone help me?

Thanks,
Michael

Michael Walker
Telstra BigPond ADSL - Technical Support
0413-331-334
http://www.michaelwalker.f2s.com/
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Newbie question

[Michael Mateja]

I have a windows 98 machine and I am trying to install VNC.  I downloaded the
Win32 zip archive (zip) file and I unzipped it using freezip.  But I don't see
the setup file.  What am I missing?
Thanks for your help,
mmateja
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Re: ssh, vnc and port monitor

[Michael March]

"Allow Loopback" is for the server machine.

- Original Message - 
From: "Neal Isaac" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, July 26, 2001 10:20 AM
Subject: RE: ssh, vnc and port monitor


> Thanks for everyones help in this matter.
> But I am afraid I am getting confused.
> I am running VNC server and SSH server on the same computer, waiting for
> connections.  I am only using Vnc viewer on another machine to connect.  I
> was under the impression that I had to change the registry setting on the
> machine running the viewer.  Do I have to run a copy of VNC server on this
> machine as well?  Just to confirm as well, I am entering the ssh command on
> the client.
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of Miroslav Luptak
> Sent: Thursday, July 26, 2001 2:33 AM
> To: [EMAIL PROTECTED]
> Subject: Re: ssh, vnc and port monitor
> 
> Hi, Neal.
> 
> I have just tested it on my VNC Server running on W2K Pro and
> it works just fine. Being rather Unix oriented, I perhaps used
> an incorrect wording when talking about creating a "key" in
> the registry. I should have said "create the following dword value
> in the registry:"
> HKEY_LOCAL_MACHINE\Software\ORL\WinVNC3\AllowLoopback=1
> 
> Attached is a file vnc.reg for importing the right value to the
> registry. Execute "regedit vnc.reg" to add it to the registry and
> then RESTART THE VNC SERVER !!!
> 
> > Yes, Im running Windows ssh, and after all this frustration, I could write
> a
> > book on it.
> 
> Well, life with Windows is worse than a bad marriage :-) Lot's
> of frustration ... And Bill says "Windows is easy to administer".
> Imagine that frustration if it was difficult to administer :-)
> (Just kidding, please do not start disputes about
> Unix vs. Windows frustration)
> 
> > At first I though ssh was the problem, but I am able to use it
> > on its own quite well. (and will never use Telnet again)
> 
> No, ssh is OK. The "Local loopback disabled" message comes from WinVNC
> and it does not mean an error. It just a feature available on Windows.
> 
> > So I read that page about registry entries and made the entry and still no
> > dice.  Its interesting that the way it reads I expected the Reg. Keys to
> be
> > there and I would have to change the values.
> 
> Very good point ! I would also suggest that all available registry
> entries for VNC were created upon installation with default values.
> This would avoid a lots of confusion and frustration.
> 
> > Either way I have both a VNC 3.3.3 entry and a Win VNC entry in the
> registry
> > so I created a key in each.  I have tried changing the type Dword to
> binary
> > etc. and still no go.  It keeps giving me the error local loopback
> > connections are not allowed.
> > I tried downloading a new version and re-installing and still nothing.
> > So now what do I try?
> 
> Try my attachment. After adding it to the registry, DO NOT FORGET
> TO RESTART THE VNC SERVER !!!
> 
> Best regards,
> 
> Miro
> REGEDIT4
> 
> [HKEY_LOCAL_MACHINE\SOFTWARE\ORL\WinVNC3]
> "AllowLoopback"=dword:0001
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Re: List of references using VNC

[Michael Duck]

Shikhar

Contact me direct via  e-mail and I will give a detailed summary of our use
of VNC.  Been using it for 2.5 trouble-free years.

Michael M. Duck
[EMAIL PROTECTED]
Telemetry Systems Networking
Tuolumne Utilities District
Sonora, California

- Original Message -
From: "Shikhar" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, July 30, 2001 07:38
Subject: List of references using VNC


> Hi all,
>
> I am in the process of recomending my superiors for using VNC for our
> product development. To convince them i need a list of references where
VNC
> is used.
> Can I get a list of reference on some site etc.
> Any help is highly appreciated.
>
> Thanks and regards,
> Shikhar
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Re: Silly Question...

[Michael March]

Is it just me or does Hextile encoding with SSH compression seem to work
better than any version of Tight?



> One version of TridaVNC, at least, has a "Tight" encoding option that works
> better over dialin lines than the standard Hextile encoding.
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VNC Viewer (server listing)

[Michael Fox]

Hello,

Is there any way to edit/delete entries stored in the VNC Viewer 'VNC
server' list?

I can't seem to find any info on this in the Documentation/FAQ's, or program
options..

Any help is appreciated.

Regards,

Michael Fox
Analyst/Programmer
Century Software
Ph: +612 9460 1422

This E-mail from Century Software Pty Ltd expresses the views of the
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in any way. If you are not the intended recipient please contact the
sender as soon as possible and delete any copies of this message.
Please note that although this E-mail has been checked, we cannot accept
any responsibility for any transmitted viruses. It is therefore your
responsibility to virus scan attachments (if any).
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Help: CTRL-ALT-ESC isn't sent to client

[Michael Milette]

Hi there!

I was wondering if any of you could tell me how I could possibly send a 
CTRL-ALT-ESC from a VNC Client running on a Windows 98 platform to a host 
running a VNC Client on a Windows NT 4.0 platform? Unlike CTRL-ALT-DEL, 
there doesn't appear to be any VNC menu item which would allow me send the 
appropriate keystrokes to bring up the Windows NT Task Manager. Also unlike 
the CTRL-ALT-DEL sequence, Windows 9x has no reason to intercept the 
CTRL-ALT-ESC sequence as it doesn't do anything on that platform.

I know I can right click on the NT task bar and select Task Manager but 
there are times when the task bar just isn't visible. Any suggestions would 
be much appreciated.

    Michael Milette
TNG Consulting Inc.
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VNC properties, where are they stored under Win NT?

[Michael Fonte]

Where are the VNC properties stored under Win NT (version 4.0)?  I found
keys for the properties (like poll under cursor, etc) but directly changing
the values in the registry does not impact the VNC (App/server) even after a
reboot.  The reason I am asking is I can't get any changes to the properties
to save, they always revert back to their original settings.

Thanks,

Michael
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CTRL-SHIFT-ESC (Was RE: Help: CTRL-ALT-ESC isn't sent to client)

[Michael Milette]

Oops. Sorry about that. I was actually refering to CTRL-SHIFT-ESC.

 Michael Milette
 TNG Consulting Inc.

At 08:32 AM 2001-08-07 -0400, you wrote:
>Hmm...can't help you with this because Ctrl-Alt-Esc doesn't do *anything* on
>my NT4 machine even at the console, so I can't test it.  I've always used
>Ctrl-Alt-Del and clicked "Task Manager" to bring up the task manager.
>
>-Original Message-
>From: Michael Milette [mailto:[EMAIL PROTECTED]]
>Sent: Monday, August 06, 2001 11:53 PM
>To: [EMAIL PROTECTED]
>Subject: Help: CTRL-ALT-ESC isn't sent to client
>
>
>Hi there!
>
>I was wondering if any of you could tell me how I could possibly send a
>CTRL-ALT-ESC from a VNC Client running on a Windows 98 platform to a host
>running a VNC Client on a Windows NT 4.0 platform?
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VNCviewer and multiple NICs (which IP would vnc viewer pick?)

[Michael Rybarski]

Hi,

I can connect to a remote PC but VNCviewer does not show feedback/graphics.
Here's my setup:

my [PC1] with 192.168.10.43/24 (NIC) and 192.168.31.210/24 (PPTP VPN dialup)
starts VNCwiewer and connects to [PC2] 192.168.31.240/24 through an dialup
PPTP connection to 192.168.31.0/24 network.

For the VNC to work:

1.Should PC2 know return route to 192.168.10.43?  In other words when VNC
viewer initiates connection to 192.168.31.240 would it bind to
192.168.31.210 or 192.168.31.43 adapter???

TIA

Michael
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RE: VNC Commander

[Munoz, Michael]

I was unable to connect to this ftp..

Thanks,

Mike Munoz



-Original Message-
From: Ceri Hankey [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 15, 2001 4:52 PM
To: [EMAIL PROTECTED]
Subject: Re: VNC Commander


Please send me the zip file. I will then place it in
ftp://perso.wanadoo.fr/ceri.hankey/tools/ for others to access if you wish

Thanks.


- Original Message -
From: "Glenn Mabbutt" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, August 14, 2001 10:03 PM
Subject: RE: VNC Commander


> as you may have noticed this list doesn't accept attachments ;)  Links
> appreciated.
>
> -Original Message-
> From: Tony Caduto [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 14, 2001 1:53 PM
> To: [EMAIL PROTECTED]
> Subject: VNC Commander
>
>
> Hi,
> Would anyone be interested in a VNC viewer that worked similar to PC
> Anywhere?
> IE where you could create and edit connections in a window and store the
> password for each connection if desired?
> I have been working on such a program and will be releasing it for free
> sometime soon.
>
> See the attached zip file for a screen shot.
>
> the program uses VNCX activex control by Thong Nyguen from New Zealand.
>
> Feed back would be appreciated.
> I can also send a beta version to anyone that is interested, just let me
> know
>
> Tony Caduto
>
> [demime 0.97b removed an attachment of type application/x-zip-compressed
> which had a name of vnc commader.zip]
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Bug in 3.3.3 r2 RE: Unable to set/save VNC properties

[Michael Fonte]

I think I have tracked down the problem.

The properties box sets the registry values
OnlyPollConsole
OnlyPollOnEvent

BUT it seems VNC looks for the keys
PollConsoleOnly
PollOnEventOnly

If I set the second set of keys manual things work.  This bug may be fixed
in later versions, however I am stuck with r2.  Later versions seem to
generate a lot more network traffic which interferes with one of our
applications which uses socket messages.

Michael

-Original Message-
From: Michael Fonte [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 23, 2001 5:10 PM
To: [EMAIL PROTECTED]
Subject: Unable to set/save VNC properties


Sorry to send this again but I need to get this fixed.

Some additional information.  The problem is restricted to the right column
('Poll Console Windows Only' or 'Poll On Event Received Only').  When either
'Poll Foreground Window' and/or 'Poll Window Under Cursor' are selected
(which activate the right column options) it does not mater what which boxes
you click on the right, if you hit ok and then re-open the properties 'Poll
Console Windows Only' is selected regardless of what you wanted.

The registry keys OnlyPollConsole and OnlyPollOnEvent get set properly, they
are just ignored.

Thanks,

Michael



I looked through the manuals and mail archive but did not see this problem
reported.  Since it is a rather annoying problem I would have expected
someone to report it.  This leads me to believe it is something local to our
setup.  Either way I open to suggestions on how to fix this.

I am running VNC 3.3.3 r2 (more recent releases interfere with one of our
critical programs so we can't use it)
Win NT, service pack 5 (or 6)
Login administrator or user

The problem is I can't get changes to the VNC properties to 'stick' nor can
I change the defaults.  I even tried editing the registry settings directly.
This did not work.

The WinVNC app always comes up with the same property settings (the ones
that were selected on installation).  I can change them but when I close the
properties window it defaults back to what they were before (even for the
current session).  I have to leave the properties window up for my changes
to take effect.  I have tried using the VNC->Administrative Tools->Show
Default Settings panel to change them as well.

Any help would be appreciated.

Michael
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Unable to set/save VNC properties

[Michael Fonte]

Sorry to send this again but I need to get this fixed.

Some additional information.  The problem is restricted to the right column
('Poll Console Windows Only' or 'Poll On Event Received Only').  When either
'Poll Foreground Window' and/or 'Poll Window Under Cursor' are selected
(which activate the right column options) it does not mater what which boxes
you click on the right, if you hit ok and then re-open the properties 'Poll
Console Windows Only' is selected regardless of what you wanted.

The registry keys OnlyPollConsole and OnlyPollOnEvent get set properly, they
are just ignored.

Thanks,

Michael



I looked through the manuals and mail archive but did not see this problem
reported.  Since it is a rather annoying problem I would have expected
someone to report it.  This leads me to believe it is something local to our
setup.  Either way I open to suggestions on how to fix this.

I am running VNC 3.3.3 r2 (more recent releases interfere with one of our
critical programs so we can't use it)
Win NT, service pack 5 (or 6)
Login administrator or user

The problem is I can't get changes to the VNC properties to 'stick' nor can
I change the defaults.  I even tried editing the registry settings directly.
This did not work.

The WinVNC app always comes up with the same property settings (the ones
that were selected on installation).  I can change them but when I close the
properties window it defaults back to what they were before (even for the
current session).  I have to leave the properties window up for my changes
to take effect.  I have tried using the VNC->Administrative Tools->Show
Default Settings panel to change them as well.

Any help would be appreciated.

Michael
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vncviewer and wheel mouse

[Michael Schaap]

Hi all,

A few months ago, Gary Gurevich posted a patch to this list for making a 
wheel mouse work with Win32 vncviewer: http://www.auctix.com/vnc/

I use his patched vncviewer all the time to connect to my Linux box.  It 
works like a charm with KDE apps and gvim!

However, it doesn't seem like the major VNC distributions have picked this 
patch up.  (At least, the recently released TightVNC 1.2 vncviewer did 
not.)  May I suggest that they should?  I think this is the best thing to 
happen to VNC since sliced bread (or something)!  (Thanks, Gary!)

Best regards,

  - Michael

-- 
 I always wondered about the meaning of life.   So I looked it
 up in the dictionary under "L" and there it was - the meaning
 of life.  It was not what I expected.  - Dogbert 
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fuzzy, grainy, jaggyness?

[Michael Grant]

I just installed xvnc.  One of the first things I noticed was that
when I view the desktop with vncviewer, things look more grainy, fonts 
have more jaggies, it's almost as if resolution was set wrong and I
was looking at something zoomed to fit on my screen.  Mostly what is
effected are fonts on the screen like in Netscape.  Though not *all*
the fonts.  Bold fonts seem to look worse than others.  I guess I
could say that they're not as smooth as they could be.  Is there
anyway to make things look better?

Some background: I'm running Xvnc on a Sun.  I started a server in
fullcolour mode, depth 24, 1152x900 (size of a sun monitor).  Then, I
started X in "failsafe" mode, i.e. just a single xterm and no window
manager.  Then I started vncviewer -fullscreen -fullcolour -depth 24
-shared.  The reason for doing this is so that I can get at my desktop
from anywhere.  Functionally it works great, it just doesn't look as
good as what I'm used to.

-Mike
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Re: fuzzy, grainy, jaggyness?

[Michael Grant]

Owl <[EMAIL PROTECTED]>:
> This sounds lke you need to add a font path with the -fp option.
> Exactly why do you need to start X in failsafe mode? I use VNC on
> machines that can not support X consoles at all. just curious about
> this.

Ok, where do I find out the proper font path to use?  I guess you mean 
add it to the Xvnc startup line.

I may be doing this all wrong.  My goal was to have an xserver which I 
could use at any workstation on the lan, but I am principally sitting
in front of the Sun.

I tried to compile that x0rfbserver in rfb-0.1.2, but it didn't
compile straight out of the box and didn't sink a lot of time into
it.  It looked like that would certainly solve most of my problems
because I wouldn't have to start Xvnc on the Sun, I could just use
Xsun I think.

I played with vnc a bit and realized I could start it in full screen
mode.  However, if I were to use it as my principal desktop, why would 
I want to have a full screen desktop on top of some other desktop
complete with window manager that I'd never use.  So, I figured I
could just log into the Sun under the "failsafe" mode which basically
starts nothing, then I could fire up vncviewer in full screen mode and 
work away.  It seemed like there would be less things running that
way.  

In principal, this works.  Maybe there's a better way to do this?

-Mike
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newbie - VNC commander - auto start?

[Munoz, Michael]

Hello..

Is there anyway to get VNC Commander to automatically connect to a
particular connection?  I am unable to find documentation anywhere on
this..I'm looking to execute the program and it connects (for a script)..
If there is a VNC program besides commander that will do this I am open to
change..  I like commander because it holds the password..

Thanks for your help,

Mike Munoz
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RE: vncviewer and wheel mouse

[Michael Schaap]

At 19:23 31-8-2001, Zalman Margareten wrote:
>I have unsuccessfully tried using this viewer in a Windows 2000 platform.
>Has anybody had any luck with this on a Windows 2000 machine?

Yes!

I'm using the patched TridiaVNC viewer from this page all the time, on a 
Windows 2000 machine, connecting to a RedHat 7.1 box running KDE.
(I believe it doesn't work when connecting to a Windows server.)

  - Michael


>-Original Message-
>From: Const Kaplinsky [mailto:[EMAIL PROTECTED]]
>Sent: Friday, August 31, 2001 12:53 PM
>To: [EMAIL PROTECTED]
>Subject: Re: vncviewer and wheel mouse
>
>
>Hello,
>
> >>>>> "MS" == Michael Schaap <[EMAIL PROTECTED]> writes:
>
>MS> Hi all, A few months ago, Gary Gurevich posted a patch to this
>MS> list for making a wheel mouse work with Win32 vncviewer:
>MS> http://www.auctix.com/vnc/
>
>MS> I use his patched vncviewer all the time to connect to my Linux
>MS> box. It works like a charm with KDE apps and gvim!
>
>MS> However, it doesn't seem like the major VNC distributions have
>MS> picked this patch up. (At least, the recently released TightVNC
>MS> 1.2 vncviewer did not.) May I suggest that they should? I think
>MS> this is the best thing to happen to VNC since sliced bread (or
>MS> something)! (Thanks, Gary!)
>
>Thank you for the suggestion, but I'm not sure when I'll be able to
>look at that patch. I saved your message for reference, and I'll take
>a look when time permits.
>
>--
>With Best Wishes,
>Constantin
>-
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>-
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>-


-- 
 I always wondered about the meaning of life.   So I looked it
 up in the dictionary under "L" and there it was - the meaning
 of life.  It was not what I expected.  - Dogbert 
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multiple vncclients?

[Michael Urban]

I have a vnc server running on a win2000 box.  Multiple users wish to
connect to it.  Presently whenever someone connects with vncclient, anyone
else connected loses their connection.

Is it possible to have multiple connections?
Is it possible to prevent others from connecting if one already is
connected?

Michael.
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RE: Sceen Colours.

[Michael Lerner]

It can be any solid background. As long as the client can display it.

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Bendotti,
Gerard
Sent: September 7, 2001 4:39 AM
To: '[EMAIL PROTECTED]'
Subject: Sceen Colours.


Someone recently advised a solid blue background for the desktop, I
understand the benefits of solid colour, but why blue?

Gerard Bendotti
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Selection problem on server desktop with WinVNC

[Michael Molloy]

I've got WinVNC 3.3.3 R9 running on Windows 2000. To access it, I've tried 
both the Linux client (3.3.3 r2 linux 2.0) and a java enabled linux browser. 
The problem occurs in both the viewer & browser, so it looks to be a server 
problem.

If I select an icon on the bottom of the desktop, it is selected along with 
every icon above it on the desktop. The only way to select a single icon is 
to select the icon at the top of the desktop (like the "My Computer" icon). 

I've had this problem before, rebooted the Win2K machine, and the problem 
went away. However, it is not going away this time after rebooting.

Seached the archives, but I couldn't find anything. Any help is appreciated.

Thanks
--Michael

-- 
======
Michael Molloy   ResortQuest International
Java Developer   www.ResortQuest.com
901.762.4076 [EMAIL PROTECTED]
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RE: Bad Review of VNC at CNET

[Michael Milette]

Bonjour Patrice,

I have had it running with a very similar configuration to yours except 
that the CPU's were just quad Xeon 450's. I will even raise you the fact 
that it wasn't only running NT Server but NT 4.0 Terminal Server Edition 
plus MetaFrame and it worked great. I would connect remotely to MetaFrame 
and then run VNC to connect to a local machine. I have even had multiple 
sessions going by multiple users.

Of course I have see situations where programs like PatchWorks will tighten 
security to the point where almost nothing will run on a box. Even without 
PatchWorks, I seem to remember a security utility which can increase the 
level of security of your server. Set to the highest level, your system 
won't even be able to see any network.

Perhaps if you could give us some additional insight into what exactly the 
symptoms are, we might be able to provide you with a few suggestions. Give 
it a try. You will find that many people here enjoy helping each other out, 
something you don't necessarily see with commercial software. In my 
experience with commercial software, except in the case of the simplest 
problem with the users ability to use the software, tech support will 
typically act as if you are the very first person in the world to ever 
experience the problem and then will tell you that they will send a request 
to have the developers look it. This does not guaranty that it will 
actually be fixed. I have spoken to many Tech Support managers who made it 
clear to me that the first bugs to get fixed are the ones they get the most 
calls for. If you are actually the only person to ever complain about a 
real bug, they may never even look into it.

This is not to say that VNC is any better in that respect. I have been 
waiting for a bug to be fixed for about 2 years now (depleting resources 
while connecting on Windows 9x over a slow connection). However, at least 
there is an active community of end users ready and willing to help you out 
and the developer has actually looked into "the source code", confirmed the 
problem and has stated that he will try to fix it some day since it is not 
a small undertaking to correct the problem. With commercial software, you 
NEVER get to talk to the developer. For all we know, they never even see 
your bug report.

Just one word of warning: People around here get cheesed off really quick 
(probably too quick if you ask me) if you ask a question which has already 
been answered on the Frequently Asked Questions (FAQ) page. It is very 
possible that the reviewer of the VNC article at CNET did ask a question 
and was sent to the FAQ page to find the answer him/herself.

I realize that the FAQ page is there for a reason, and a good reason too. 
However for newcomers who may not be used to looking for information on the 
Internet, this can leave you with a bad taste in your mouth. First 
impressions are very important. Someone who feels good about having found 
and subscribed to vnc-list could easily be quickly discouraged when simply 
told "RTFM" or just "Read the FAQ before asking a question here!"

Hope this helps. By the way, the FAQ page can be found at 
http://www.uk.research.att.com/vnc/faq.html.

At 08:00 AM 2001-09-18, you wrote:
>VNC doesn't work against a Dell PowerEdge 6400 quad-700MHz CPU machine, 2G
>of RAM, with NT Server 4 SP 6a with security hotfixes applied, including the
>fixes highlighted by PatchWork.
>
>VNC works against an old Pentium II clone, with less memory, no brand name,
>NT4 SP5.
>
>Regards,
>Patrice Boivin
>Systems Analyst (Oracle Certified DBA)
>
>Systems Admin & Operations | Admin. et Exploit. des systhmes
>Technology Services| Services technologiques
>Informatics Branch | Direction de l'informatique
>Maritimes Region, DFO  | Rigion des Maritimes, MPO
>
>E-Mail: [EMAIL PROTECTED] 
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RE: can not connect to VNC

[Michael Williams]

I have set the default password inside of VNC. Several times. Also
re-booted the server, stopped and started the service, etc.

The only way to use these machines is to log on locally, but of course
that is not what I want to do.

Michael


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Steve Palocz
Sent: Wednesday, September 19, 2001 1:51 PM
To: [EMAIL PROTECTED]
Subject: RE: can not connect to VNC


I think this is the current user password is set you need to set the
default (local machine) password. This can be found in start -> programs
-> vnc -> administrative tools -> Show default settings.

Steve

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Michael
Sent: Wednesday, September 19, 2001 1:43 PM
To: [EMAIL PROTECTED]
Subject: can not connect to VNC


I have installed the latest client on a number of Win2k machines.

On about half it works and on the other half it does not work. They are
all same regarding instll, etc. They all have basic Win2k not service
packs. Trying to use IE version 5.5+.

Also, let me clarify, I can connect but when I enter the correct
password (yes it is correct) I get a message stating that VNC does not
have a valid password enabled. Until a password is set, incoming
connections cannot be accepted. I am getting this on about 12 machines
out of maybe 35. Same software, on either Win2k or NT 4. There does not
seem to be any same variables either.

Any help appreciated.
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Re: Sever Side Scaling/Zooming?

[Michael Milette]

Hi Kyle,

There sure is. Go into the connection options of the WinVNC client, either 
before you connect by clicking on the "Options..." button where you enter 
then address of the host machine you want to connect to or even after 
connecting by right click the VNC button on the task bar and select 
"Connection Options", and look for the "Scale by" setting in the "Display" 
section of the dialog box. Configure as needed and click OK. That's all 
there is too it.

Hope that helps...

Michael Milette
TNG Consulting Inc.

At 10:44 AM 2001-09-18, you wrote:
>Hi,
>Is there any way of making the server scale an 800x600 desktop to 640x480?  I
>have a laptop that can only display 640x480 but all the programs I would like
>to run are only visible at 800x600.  The laptop isn't powerful enough to run
>x so it has to use svncserver (which works fine at 640x480) but it is
>incapable of scaling... Also I think this feature would be much better in the
>server anyways because it can save on bandwidth and processor time on the
>weaker computer.
>Is this type of funtionality already there?  Or is it in the works?
>Otherwise which piece(s) of source should I be diging through?
>Thanks,
>Kyle
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Re: Confirm Connection

[Michael Milette]

Try the TightVNC implementation (as others have recommended).

If you also need it available for desktop maintenance (without requiring to 
prompt the user), you might be able to schedule it (using the task 
scheduler) to shutdown and then re-start it up in a mode that does not 
require a response to the prompt during certain hours. Don't forget to then 
repeat the shutdown/restart process again enabling the prompt.

 Michael

At 01:04 PM 2001-11-01, you wrote:
>We are currently looking at VNC as a remote control software. It looks
>awesome in every respect except it does not appear to request a
>confirmation of connection. In our industry this is a must because of
>confidential information. Is there an add on or registry changes for NT or
>Windows 2000 that would allow a challened response or confirmation of
>connection. Any help would be greatly appreciated.
>Thanks
>-
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Star vncserver at bootup

[Selle, Michael]

How to start vncserver at bootup under AIX?

Michael Selle

T-Systems

debis Systemhaus TCS/PB
Address: Erich-Herion-Str. 13, 70736 Fellbach
Phone: +49 711 17 40306
Mobile: +49 171 4064259
Fax: +49 711 17 49663
mailto:[EMAIL PROTECTED]
Internet: http://www.t-systems.de
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Re: winVNC between 95 and 2000

[Michael Milette]

Hi Alpesh,

If you wait long enough, I suspect that your Win95 client might actually 
crash your system do to a problem with Windows 9x. Try the next version of 
TightVNC (1.2.2 I think) which is due out any day now at 
http://www.tightvnc.com/. It is supposed to address the problem and is 
optimized for slow modem connections.

In the mean time, you can try changing (the Windows 2000 machine) the 
resolution of the screen and/or the number of colours on your host. A lower 
resolution and number of colours will result in less data to transmit over 
the modem. I have noticed that just changing the video mode can fix the 
problem with some video drivers which experience compatibility issues.

Last but not least, you didn't mention if there was a firewall involved 
between the two connections. This may be another area to explore for 
problems if a firewall is involved.

I know it works because I use it all the time. Hope you find some of this 
helpful.

 Michael Milette
 TNG Consulting Inc.

At 03:18 PM 2001-11-08, you wrote:
>Hi,
>I am trying to connect from a VNC viewer on Win95 to a Win 2000 machine 
>running VNC server. VNC server running as a service. The client can 
>authenticate to the server but is not getting any screen updates. It just 
>waits for the screen update.
>
>The win95 has DUN1.4. VNC release is vnc-3.3.3r9-x86-win32.
>
>Any ideas or suggestion are greatly appreciated,
>Alpesh.
>--
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no keyboard in tightVNC fullscreen

[Michael Feldmann]

Hello all,

recently having switched from standard VNC to tightVNC (good work) I 
experience the following problem:

(client and server(s) are using tightvnc1.2.1)
I try to connect from a linux box (Suse7.1, kernel 2.2.18, to a win9x 
server, when running in window mode, everything is running fine.
In fullscreen mode,however, i have only a mouse to work with, no 
keyboard activities are ignored. Does anybody know about this?

RdU
Michael
-- 
---

|\ Michael/| |- Feldmann Bonn Germany
| \  / | |
|  e\Ma/il | |  [EMAIL PROTECTED]
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RE: ATT, Tridia, or Tight?

[Michael Milette]

Hi Erik,

You may want to ask yourself the following questions when choosing a 
version of VNC:

o  Do you want to hide the VNC icon on the task bar?
o  Do you need to prompt the user for permission to take over their screen?
o  Do you want to disable the hosts wallpaper while connected?
o  Do you need high data compression (should not be an issue on a network)?
o  Which operating systems will it be installed on? (you mentioned WinNT/2000)
o  Do you want to keep logs?
o  Do you want commercial product tech support? (TridiaVNC only)
o  Do you need encryption?
o  Will you be connecting over a slow modem connection or fast network?
o  Will you need to do file transfers?
o  Do you want Windows NT domain authentication?

I came up with the above list of questions off the top of my head taking 
into consideration what I know of WinVNC, TightVNC and TridiaVNC/Pro.

It would be nice if someone with a good knowledge of the various flavours 
of VNC could put together a comprehensive product feature comparison chart.

As I am sure other have mentioned, which ever solution you choose, be sure 
to test not only the product but test your method of changing/upgrading it 
in the future. Another area some people have had difficulty with is 
configuration and passwords. You will want to test your configuration with 
various applications and ensure that users are not able to modify the 
configuration and password information.

If you have a DNS, giving workstations an easy to remember name (like the 
username) will allow you to take over the right users screen instead of 
having to remember or lookup IP addresses. Just be sure to maintain  the 
list or you might end up trying to take over the screen of the wrong user 
due to a PC's having been swapped by your technicians during trouble 
shooting calls. This also gives you the added flexibility of allowing users 
to connect to their PC at work from home should this eventually be 
desireable. You would simply tell them to dial into your modem pool and 
enter their user name when launching VNC.

Of course all of this applies no mater which screen takeover product you 
end up using.

If you even suspect that you might eventually want to go down the remote 
access route, I would suggest looking into TridiaVNC or TightVNC as these 
include optimization for slow connections.

 Hope some of this helps...

 Michael

-Original Message-
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of erikcw
>Sent: den 21 november 2001 23:51
>To: [EMAIL PROTECTED]
>Subject: ATT, Tridia, or Tight?
>
>
>I'm preparing to deploy VNC on my company network of approx 350 WinNT/2000
>machines.  Which is the best distribution to use?
>
>Thanks!
>Erik
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RE: ATT, Tridia, or Tight?

[Michael Milette]

___
THE OFFICIAL ANSWER

The official answer is that you can not remove the VNC Icon from the system 
tray... and don't bother asking for this feature to be added because the 
author has taken a very strong position on this (and I agree with him) and 
to my knowledge he hasn't even come close to ever being convinced to change 
his mind. It all has to do with privacy, morals and ethics. See 
http://www.uk.research.att.com/vnc/faq.html#q46 for the official details. 
Personally I think we are lucky that it is just a tiny icon. Could have 
been worse... like a bar right across the screen or something like that.
___
THE WARNING

[ Please don't take the following the wrong way. Parts of it may sound 
harsh but is in fact nothing more than a simple friendly warning based on 
the experience of many who have gone though similar experiences and is not 
meant to necessarily be a reflection of your personal situation. ]

PLEASE BE SURE TO GET MANAGEMENTS SUPPORT BEFORE YOU IMPLEMENT ANY REMOTE 
TAKEOVER SOLUTION, be it VNC, PCAnywhere, Remote Desktop Connection, NetOP 
or any of the others out there, especially if you are planning on running 
this in stealth mode. I remember installing a program called LanAssist 
years ago on old DOS machines to help me support users. I almost got fired 
the first time the VP found out that I could take over their screen at any 
time.

Without management supporting and having a good understanding of your 
initiative, your users could have management force you to completely remove 
this valuable tool from your network which would really defeat the what you 
are trying to accomplish. It's not hard to cry foul when dealing with 
privacy issues. It doesn't matter if you are the most ethical person in the 
world. What counts is what users believe and if they even have the 
slightest concern that you might be looking over their virtual shoulder 
when they are not expecting it and without them knowing it, your project 
will die right there and then. It's not all that different than tapping a 
telephone line really when you think about it.
___
THE SOLUTION

Assuming you have full management support, I have included below a few 
suggestions below on how you might overcome the challenge of removing the 
VNC icon from the system tray. Keep in mind that I haven't actually ever 
had the need or even tried any of the following techniques:

1) Download, modify and recompile the source code so that the icon no 
longer appears on the task bar. Not supported.

2) Try using TridiaVNC (supported by Tridia only). I believe a setting to 
remove or hide the icon is (or at least used to be) included. See 
http://www.tridiavnc.com/list-mailist/2001/Feb/0002.html for details.

3) There is a utility called Resource Hacker 
(http://www.rpi.net.au/~ajohnson/resourcehacker/) which will allow you to 
open WinVNC.exe, edit it and then save it. It will allow you to remove the 
icon from WinVNC.exe and may solve your problem. Whether VNC works after 
that is another question. Not supported of course.

4) Take a chance and try applying the TridiaVNC "DisableTrayIcon" registry 
change to TightVNC. TightVNC adds many features to the standard WinVNC and 
might possibly support the ability to disable the TightVNC tray icon.

5) For more details and other alternatives, check out the "WinVNC Tray Icon 
Mini-FAQ", available at http://vnc.ingecom.com/tray.htm.
___
THE SUPPORT

With the exception of the TridiaVNC and possibly the TightVNC solutions, 
any other tweak that gets rid of the icon could result in loss of support 
by the author of VNC as well as fellow VNC users. You have been warned.

 Michael Milette
 TNG Consulting Inc.

At 04:53 PM 2001-11-22, you wrote:
>how do you hide the VNC icon on the task bar?
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IDEAS... RE: TightVNC 1.2.2 released

[Michael Rybarski]

I would like to see the server lock the workstation or bring the screen
saver up (password protected) before viewer gets the screen.  That way I
could have null passwords at VNC level and still require authentication if
workstation is set with password protected screen saver.

Also, how about multiple passwords per VNC server so one can keep one
password to him/herself and give out other passwords to people on temporary
basis.

Perhaps someone already have implemented the above already?

thanks,

Michael

> -Original Message-
> From: Constantin Kaplinsky [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, November 28, 2001 10:50 AM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: TightVNC 1.2.2 released
> 
> 
> Hello,
> 
> TightVNC 1.2.2 has been released today. This version does not feature
> a lot of great new features, but I think improvements in its Win32
> part may worth the upgrade. Here is a brief list of changes over
> 1.2.1:
> 
>   - Win32 server: long-standing Win9x resource consumption problem has
> been fixed. Now the server thread does not use blocking I/O, and
> therefore is always ready to process messages from the VNCHooks
> DLL.
> 
>   - Win32 server: now built-in HTTP daemon may be enabled and disabled
> interactively from the Advanced Preferences dialog (this setting
> is saved in new "EnableHTTPDaemon" registry key).
> 
>   - Win32 server: changes in layout and text of the Advanced
> Preferences dialog.
> 
>   - Xvnc: Minor bugfix which should prevent potential dereference of a
> NULL pointer.
> 
>   - Unix viewer: Now viewer window would be raised on remote beep
> (bell) event by default. New -noraiseonbeep option and the
> "raiseOnBeep" resource set to False disable this behaviour.
> 
>   - One more packaging option for the Unix source: ready to build
> archive with Zlib and JPEG libraries inside.
> 
>   - Other minor fixes and cleanups.
> 
> New version is available from the usual place:
> 
>   http://www.tightvnc.com/
> 
> TightVNC project now has a mailing list hosted by SourceForge.net:
> 
>   https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
> 
> I'd like to thank all the people who reported bugs, contrubuted
> patches and ideas, or supported TightVNC development by any means.
> 
> -- 
> With Best Wishes,
> Constantin
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RE: IDEAS... RE: TightVNC 1.2.2 released

[Michael Rybarski]

You might know this already:
Registry has a support to, on the basis of IP address, Accept, Query or
Reject the connection.  You could setup to Accept all connections from the
support personnel IP addresses and Query the user to accept the remote for
other connections.

Anyway, with the idea of getting the workstation locked before getting the
screen, if a user wants to let someone in who is not from the support staff
(and hence doesn't know how to unlock the workstation) he would unlock the
workstation himself...


Michael

> -Original Message-
> From: Gamlem, Noralf [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, November 28, 2001 12:46 PM
> To: '[EMAIL PROTECTED]'
> Subject: SV: IDEAS... RE: TightVNC 1.2.2 released
> 
> 
> Since we're discussing passwords, I have another idea:
> 
> 1. Support personell might need access to the computer even 
> if the user is
> in front of it or not (enter a password and they're on)
> 2. "Other" people could be granted access by another password 
> AND only after
> the user has accepted a connection
> 
> This is what we would have liked (I guess we then need at least two
> passwords)... :-)
> 
> -Noralf-
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RE: IDEAS... RE: TightVNC 1.2.2 released

[Michael Rybarski]

My original idea was to lock the workstation.  And that would work for my
setup wonderfully since I have W2k.  The only way to do that on other
windows environments is to bring up the password protected screen saver

When workstations is locked it can be unlocked by currently logged user or
administrator.  Obvious advantage is that no extra (VNC) passwords are
necessary and domain passwords are easily administered through PDC/Active
Directory.

As to point number two, what I had in mind the one and only true screen
saver that is a blank screen ;)

Multiple passwords would be of benefit, I think, in the setting where there
is a few (support) people having remote access to one remote workstation(so
they all access it with the same password).  Now imagine if one is to change
the password, like in your example to give access to some other party.   It
would automatically disable access for other people from the support staff
who are not aware of the temporary change.


Michael
> -Original Message-
> From: Greg Breland [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, November 28, 2001 12:25 PM
> To: '[EMAIL PROTECTED]'
> Subject: Re: IDEAS... RE: TightVNC 1.2.2 released
> 
> 
> I don't think either of these is a good idea for several reasons:
> 
> 1) How is a screen saver password any different that no 
> screen saver with
> a VNC password?  VNC passwords are just as easy to set/change 
> as a screen
> saver password.  If the server initiated the screen saver before the
> client connected, this is just a different way to do password 
> access, but
> it is less secure and more complicated.
> 
> 2) Screen savers are usually a bad idea with remote software because
> they are highly graphical in nature.  Most remote control software
> disables them when the client connects, exactly the opposite 
> of what you
> want to do.
> 
> 3) I don't see any benifit to multiple passwords at first 
> glance.  The VNC
> password is easy to change, so just change it for a bit if you want to
> give it to someone and then change it back once they are 
> done.  Maybe if
> you gave more information about what you wanted to do, I 
> could be wrong on
> this one, but I need more info.
> 
> 
> On Wed, 28 Nov 2001, Michael Rybarski wrote:
> 
> > I would like to see the server lock the workstation or 
> bring the screen
> > saver up (password protected) before viewer gets the 
> screen.  That way I
> > could have null passwords at VNC level and still require 
> authentication if
> > workstation is set with password protected screen saver.
> > 
> > Also, how about multiple passwords per VNC server so one 
> can keep one
> > password to him/herself and give out other passwords to 
> people on temporary
> > basis.
> > 
> > Perhaps someone already have implemented the above already?
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Re: Be gentle with me!

[Michael Milette]

Hi Lee,

Sorry to disappoint (hope you are not too crushed) you but you won't be 
going into the registry this time unless you need to set this up using an 
unattended batch process of some kind.

SETTING UP VNC

1) Start up the VNC host (or server if you prefer).

If this is the first time you are running the VNC host, skip to step 4 as 
the dialog box usually comes up the first time you run it. Otherwise, 
continue with step 2.

2) Right click on the white VNC taskbar icon
3) Select properties
4) Un-check "Auto" in the "Incoming Connections" section
5) Change the Display Number.

This value is an offset of the 5800 port number. You need to set this value 
to a different number on each of your machines. Note that they need not be 
numbered sequentially. For example, if you want the host to use 5801, you 
would specify a value of 1, 5802 would be 2, etc.

6) Click OK when you are done.

SETTING UP YOUR ROUTER

You will have to add one entry on your router for each of the 6 machines 
that you want to access using VNC. Unfortunately I am not familiar with 
your router so you will have to work this out on your own. Suffice to say 
that the process is pretty much the same as it was for ports 5800 and 5900 
except that you have to repeat it for each of the machines. For example, if 
you have a machine with a display value of 2, you will have to add an entry 
on your router for 5802. I am not sure if you have to add an entry for 5902 
as well. You will have to test this on your own.

CONNECTION THOUGH THE ROUTER

When you connect using the VNC client, you would specify the host followed 
by a colon followed by the same number you set in step 5 above.

For example, if Jack's machine is set to display number 1, you could 
connect to his machine by entering:

 123.123.123.123:1

If you want to access Mary's machine, whose display number was set to 2, 
you would need to connect to her machine by entering:

 123.123.123.123:2

In each cases, 123.123.123.123 was used. This should of course be replaced 
with the IP address of your router. Note that when connecting to the hosts 
THROUGH THE ROUTER, everyone connects to the same IP address, however 
everyone uses a different port number.

DIRECT LAN CONNECTION

When connecting to the host WITHOUT going though the router (for example, 
from one machine on the LAN to another), users must connect use the IP 
address of the individual machine they want to access, however they must 
still specify the correct port number.

For example, if Jack's machine is set to display number 1, you could 
connect to his machine by entering:

 192.168.0.3:1

If you want to access Mary's machine, whose display number was set to 2, 
you would need to connect to her machine by entering:

 192.168.0.12:2

HOPE THIS HELPS

If you have any questions, feel free to ask.

 Michael

At 04:38 PM 2001-10-12, Lee Douglas wrote:
>I've read the faq's and the documentation and I think I see hints of how 
>to do this, but I'm just not sure.
>
>My problem:
>
>I have 6 Win 98 SE machines set up behind a single router (Cayman 3220-H). 
>I've managed to forward ports 5800 and 5900 to one of the machines and can 
>connect very nicely too that one machine.
>
>My question is how (specifically) do I set up the other machines so that 
>they can also be addressed? I can forward additional ports to each machine 
>on the router, I just can't figure out how to make the machines listen and 
>respond on ports other than 5800 and 5900.
>
>It seems to have something to do with registry changes, but I can't quite 
>make them out and I'm reluctant to muck up the registry on one or more of 
>the machines.
>
>So, can some kind soul please point me to _explicit_ directions and/or 
>give me directions through the list?
>
>TIA!
>
>Lee
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Re: Password question

[Michael Milette]

Hi Jaime,

I believe it is encrypted and stored in hexadecimal the registry:

[HKEY_LOCAL_MACHINE\SOFTWARE\ORL\WinVNC3\Default]
Password=...something in hex...

There could possibly be another similar entry at:

[HKEY_CURRENT_USER\SOFTWARE\ORL\WinVNC3\Default]
Password=...something in hex...

This second one would be used if the user is already logged into the machine.

 Michael Milette
 TNG Consulting Inc.

At 06:21 PM 2001-10-12, Salas, Jaime wrote:
>When you set a password for the WINVNC where does that file sit at. Is it an
>INI File or does VNC have it hard coded into the software. Could you please
>let me know.
>
>
>Thanks !
>
>Jaime C. Salas
>
>Volt Services Group
>Corporate I.T. Management
>Ph#714-921-7554
>mailto: [EMAIL PROTECTED]
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Re: How to list VNC server displays

[Michael Milette]

Hi Fred,

On Windows, "netstat -a" at the command prompt will list all of the ports 
in use. Then look for port numbers that are an offset of 5800 and 5900. I 
don't know what operating system you are using but if it has a similar 
command, you might want to give it a try.

     Michael Milette
 TNG Consulting Inc.

At 11:39 PM 2001-10-16, you wrote:
>Hello,
>
>Is there a way to check what vncserver displays I've started using 
>"vncserver :N"?
>Can't seem to find any in the documentation.  A search of the archive turns up
>unrelated issues for the first few pates.
>
>Thanks,
>
>Fred
>
>--
>Fred Ma
>Department of Electronics
>Carleton University, Mackenzie Building
>1125 Colonel By Drive
>Ottawa, Ontario
>Canada K1S 5B6
>[EMAIL PROTECTED]
>==
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VNC Server - Linux - Graphical Interface?

[Michael Norman]

I have been running VNC on a Windows Box and have been very pleased with the 
results. I have inturn decided to run it on a Linux Box - Redhat 7.1 but I 
am a little disappointed that I cannot work out the graphical interface? I 
understand that I am still in the 'KDE environment' but is there any way I 
can use the graphical interface?

Thanks all,
Michael

_
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RE: TVNC Pro Observations

[Michael Milette]

The free server that authenticates with NT can be found at 
http://www.smtechnologies.com/downloads.htm. Just scroll down to the bottom 
of the page.

 Michael

At 11:20 AM 2001-10-17, Steve Bostedor wrote:
>That is pretty steep.  Someone else on here made a way to authenticate with
>NT in a free version if that is a feature that you are looking for, and you
>can have a nice front end GUI/scanner for $30/unlimited workstations at
>http://tgcs.web-it.com.  I'll attempt to hunt down the URL for the free
>server that authenticates with NT.
>
>-Original Message-
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of
>[EMAIL PROTECTED]
>Sent: Wednesday, October 17, 2001 11:07 AM
>To: [EMAIL PROTECTED]
>Subject: TVNC Pro Observations
>
>
>Tried the Beta/Demo.. just seems like htey tacked
>on a pretty front end to locate and connect.. ( oh
>and 'file transfer coming soon'. )
>
>Makes things a bit eaiser, with a gui/click and view
>interface, but what sysadmin doesnt know what his
>machines are called and if they have vnc installed,
>( 'auto detect' )  and cant type a simple name in pretty
>darned fast
>
>Using NT Domain authencitation IS cool, if you are
>on an NT domain.. be easy to effectivly change passwords
>in-masse instead of touching each pc..
>
>But it sounds a bit high for a ( windows centeric ) convience,
>@ $50/workstation? True it might save time... donno ...
>
>Zig-
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RE: Netopia R9100 DSL Router

[Michael Rybarski]

Hi.

Most likely Netopia is configured for NAT.

If yes, here are two solutions:

You'll need to tell your router to forward given port to specific IP address
and port.  For example:

Netopia port - > Workstation IP:port#

5900 - > :5900
5901 - > :5900
5902 - > :5900

Above you'll need to enter under NAT servers.

Now, to connect to workstation B you'll need to enter :1,  for C
:2 and so on.

Another way is to configure VPN server on Netopia, than connect to Netopia
via VPN and use local IP addresses of your remote network to connect to each
remote workstation/server.

=M


> -Original Message-
> From: Richard Marshall [mailto:[EMAIL PROTECTED]]
> Sent: Friday, October 12, 2001 11:55 AM
> To: [EMAIL PROTECTED]
> Subject: RE: Netopia R9100 DSL Router
> 
> 
> yes!!! i have. unfortunatly our netopia is refusing all 
> telnet connections
> now so i can't see the conf. that we have. However, when i 
> had this problem
> i phoned the netopia support line. - -they were incredibly helpful and
> talked me thorugh the configuration.
> 
> I have doc'd our conf but i'm not sure how thorough these 
> are... also make
> sure you have the latest firmware - i know this can cause a 
> problem if it's
> before 4.8.x
> 
> hope this helps
> 
> rich :)
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Ken McComas
> Sent: 12 October 2001 17:42
> To: [EMAIL PROTECTED]
> Subject: Netopia R9100 DSL Router
> 
> 
> I manage a small network at our church. It is connected to 
> the Internet thru
> a Netopia R9100 DSL router. I would like to VNC into the 
> server that sets
> behind the router for remote maintenance. I use VNC within my 
> network often
> but cannot get connected to the church server even with 
http://ipaddr:5800
in IE. Has anyone configured the Netopia router to allow VNC traffic thru
it?

Thanks in advance,
Ken McComas ?
West Texas Rehab Center
Network Administrator
[EMAIL PROTECTED]
915.793.3437
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[demime 0.97b removed an attachment of type application/x-zip-compressed
which had a name of netopia vnc.zip]
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Password Protect Change Password

[Michael Rich]

Hi folks, I'm new, so I'm hoping this hasn't been covered yet, I searched
the archives but really couldn't find anything specific to my question.

What I want to ask is if there is a way to password protect the ability to
change the server password?  I've got it installed on my mother-in-law's
Win98 PC (as a service) and my brother-in-law keeps changing the password so
he can get into her computer.

Right now she's resorted to simply closing VNC when it starts up, but is
there any future plan to add the ability to password protect the the ability
to change the password?  This would really be a time saver because as it is
now when he changes it, I have to step her through changing the password
back to something so I can get in to change it back to my password and you
can imagine how long it takes to explain that whole process to her.
Mysteriously she forgets all the steps everytime it has to be done.

Thanks for any insight,

Michael Rich
http://www.AlphaX86.com
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RE: Password Protect Change Password

[Michael Rich]

> How about creating a registry merge file that is the vnc
> branch with the
> correct password hash setting?  Then all she would have to do is
> double-click on the merge file to reset the password.

Not a bad idea, but this is a woman who can't find the icons on her desktop
sometimes.  However there's nothing to say I couldn't add a regedit.exe
command to the Run key in the registry to automatically apply the merge file
when she logs on each time.  Then to change it she'd just have to log off
and then back on and I believe she knows how to do that.

Thanks for the idea,
Michael
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RE: Password Protect Change Password

[Michael Rich]

> Don't you think your brother-in-law will discover, figure
> out, and defeat
> that one as well? Or is the run key in the registry beyond
> the scope of his
> skills?

Maybe, but he's not a programmer, so he probably won't think to look in an
obscure registry key.  I really don't even think he knows what regedit.exe
is to be honest.

As for the dear abby reply, I'm really not at war with him, I'm just doing
this in response to my mother-in-laws request.  What he's doing is
connecting to the computer and enabling all the archive features of her IM
clients and other "spy" related things to see what's she doing on the
computer.  I really don't agree with that approach because what she's doing
is not his buisness, thus why I told her I'd help her out.

FWIW, to make this msg on topic, I put the command in this registry hive.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

I added added a new string value called Update1 with a value of REGEDIT /s
C:\WINDOWS\ABC.REG

I then rebooted the computer and there was no message boxes or anything, so
it seems to work fine.

Again, thanks for the idea on this.

mike
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VNC Services

[Michael Workman]

I am new to your group just signed up 20 Min ago

I saw the VNC Software and liked it. how ever it has no use for me unless I
make some major changes. so I am looking at breaking it apart and converting
it
right into a DLL layout.

anyway I wanted to know what is the max & min speed of internet connection
VNC can use
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Connection Speed

[Michael Workman]

What in the min Connection Speed VNC needs

[demime 0.97b removed an attachment of type application/x-pkcs7-signature which had a 
name of smime.p7s]
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Re: Carry audio data on a VNC connection

[Michael Duck]

Perhaps  www.speakfreely.org  has the solution you are looking for.
Works well with VNC.  Not a VNC add-on.

Michael M. Duck
Sonora, California

- Original Message - 
From: "Gabriel Calin" <[EMAIL PROTECTED]>
Subject: Carry audio data on a VNC connection


> I'm wondering if it's possible to carry audio (from mic or line-in)
> from a vncserver station to a client station (and vice-versa), so people
> can actually talk during a connection, like a audio-conference. I'm not
> sure if someone already added a feature like this to vnc...
> 
> Thanks
> Gabriel
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start vncserver at boot up

[Michael Selle]

Hi all,

VNC 3.3.3.2 on AIX 4.3.3.0.9

Is there a possibility to start
vncserver on boot up

Thanks in advance

Michael Selle


__
Keinen Jackpot mehr verpassen! Mit dem Dauerschein des WEB.DE Lottoservice.
Einfach und bequem Lotto tippen! http://tippen2.web.de/?x=4
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Re: AW: Timeout Problem with XP - firewall not the problem

[Michael Milette]

 I still have control of 
when my operating system and applications get upgraded.

 Michael Milette

At 07:14 AM 2001-12-11, you wrote:
>on http://www.symantec.com/pcanywhere/Consumer/
>they write pcanywhere can be used on XP. Is this legal?
>
> >  "Except as otherwise permitted by the NetMeeting, Remote Assistance,
> >   and Remote Desktop features described below, you may not use the
> >   Product to permit any Device to use, access, display or run other
> >   executable software residing on the Workstation Computer, nor may
> >   you permit any Device to use, access, display, or run the Product
> >   or Product's user interface, unless the Device has a separate
> >   license for the Product." (from: Microsoft Windows XP Pro EULA)
>-
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RE: AW: Timeout Problem with XP - firewall not the problem

[Michael Milette]

S! I don't think they need any more help in coming up with new ideas on 
how to increase profits...

 Michael

At 05:00 PM 2001-12-12, you wrote:
>Subject: RE: AW: Timeout Problem with XP - firewall not the problem
>To: [EMAIL PROTECTED]
>
>If (hypothetically) the number of non-Micro$oft hosts on the Internet
>dropped below, say, 20% or so, they would probably make it illegal to
>connect to a non-Windoze box at all. They might even make it illegal to
>spread rumors that non Micro$oft OS's even exist...
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Re: Hide the VNC on workstations

[Michael Milette]

Hi Scott,

I'm afraid you won't get any support here to hide the VNC icon. Check the 
vnc-list archives at http://www.uk.research.att.com/search.html and the FAQ 
at http://www.uk.research.att.com/vnc/faq.html to learn why. However at the 
very least you should read the excellent recent reply on the same subject 
(written by yours truly) at 
http://www.uk.research.att.com/vnc/archives/2001-11/0461.html.

As for ensuring that students can not change the password, simply lock down 
the registry using the security settings if you are using Windows NT, 2000 
or XP.

If you are using something in the Windows 9x family including ME, you will 
have a tougher job locking down the system. That being said, you could do 
something like resetting the registry key where the password is stored each 
time the machine boots up or possibly do it several times a day using the 
scheduler.

If you are not too worried about your students hacking the registry to 
reset the password, you can prevent them from accessing the configuration 
options in VNC by running it in restricted mode. See WinVNC Documentation - 
Advanced Settings on the http://www.uk.research.att.com/vnc/winvnc.html 
page for the details. Look specifically for the AllowProperties setting.

By the way, if you budget is tight and you want to lock down Win9x 
machines, check out the following:

Lock Down Your PC - Keep unauthorized eyes and fingers away from your 
precious files, folders, and settings. Article by PC World.com available at:
 http://www.pcworld.com/hereshow/article/0,aid,10907,00.asp

Lock Your Desktop - Another article on locking down your Windows 9x 
desktop. This one is from PC Magazine and available at:
 http://www.zdnet.com/pcmag/pctech/content/18/14/ut1814.001.html

IconLock - A free PC Magazine utility. IconLock was designed to provide a 
layer of protection without sacrificing performance or system usability. 
The download link in the above article doesn't work but you can download 
the latest version from the following page:
 http://www.zdnet.com/downloads/stories/info/0,,77408,.html

Before you consider TridiaVNC (commercial product) or TightVNC, both which 
support the hiding of the icon though a change in the registry, you might 
consider the fact that if you leave the icon there, the kids may be a 
little more careful about what they are doing if they know that somebody 
could be watching them. I have even heard about people who like the icon so 
much, they are looking for a program to have it turn black randomly so that 
they think they are being monitored.

If you are using an operating system other than Windows, please disregard 
this message altogether.

 Hope some of this helps...

     Michael Milette


At 01:13 PM 2001-12-13, you wrote:
>Hello,
>  I would like to deploy VNC on the computers in the school district. I
>need to hide the application and make it so students can not change the
>password.
>Does anyone know how to do this.
>Plus, what is the best method to deploy this to many computers at once
>or rapidly.
>
>Thanks
>
>Scott Van Singel
>IT Director
>Sturgis Public Schools
>Phone: 616-659-1512
>Email: [EMAIL PROTECTED]
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Re: Make an VNC-Connection visible

[Michael Milette]

Assuming you are using Windows, the white VNC icon that appears on the task 
bar will change from white to black while someone is connected. 
Unfortunately I don't know of any way, without modifying the source code to 
show that someone connected and then disconnected from your screen while 
you were away from your PC.

The only work around might be to enable the option which pops-up a dialog 
box asking the user on the host machine for permission to allow a guest to 
connect to their screen. This feature is not included in the standard 
WinVNC but is available if you are using TightVNC and possibly TridiaVNC.

 Michael

At 03:58 AM 2001-12-14, you wrote:
>Hi,
>
>is there possible to make a connection visible so that a user can see if an
>Admin already connected to him?
>
>Thanks to all
>
>Paykan
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Re: connecting through a router

[Michael Feldmann]

Am Donnerstag, 20. Dezember 2001 21:44 schrieb Carl:
> I'm a newbie so please bear with me.  I have an internal network
> behind a router.  I haven't found any down to earth english way to do
> this.  I am very fimilar with LAN's, but not WAN's.  How do I get to
> the internal IP address?

If you have a ssh-daemon on the router, you can connect through ssh 
(cf. FAQ on VNC homepage).
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win 2000 w/cable connected to win XP w/isdn 64 ?

[Michael Marzio]

Dear colleagues,
After searching through the archives, I still have a question. Please excuse me if it 
is a stupid one. I am new to this.
I want to know if I can use VNC to connect this XP Windows/ISDN 64 machine at home to 
my Windows 2000 machine at my office which has a good cable connection, so as to use 
that better cable connection from home for downloads for example, which I would simply 
picj up when I go back to the office.
Mike Marzio
www.realenglish.tm.fr



--
Je suis en deplacement. Vous pouvez m'ecrire a cette adresse email yahoo ou bien a mon 
adresse email habituelle. Je verifie mes boites aux lettres tous les jours ouvrables.  
 email: [EMAIL PROTECTED]site web: http://www.realenglish.biz 

 

 



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Re: Windows layer storage/transmission.

[Michael Ossmann]

On Wed, Jan 02, 2002 at 04:58:12AM -0600, ScanMan wrote:
> On Wed, 2002-01-02 at 03:55, A friend wrote:
> > Why not, for the server, for the client it's no problem for sure. Is
> > it not possible to capture the image from within a single window
> > within MS-Windows?  I think it is, since Alt-PrintScreen does the
> > same thing. Monitoring window creation/deletion must be possible
> > too.
> 
> Hmmm, yes, I didn't think of that. However, wouldn't a global pixmap
> cache solve the same problem in a more general way? For example, the
> server would scan the screen for patterns that tend to repeat, and
> then send them to the client only once, thereafter sending only a
> reference number. Things like font characters, window borders,
> buttons, icons, etc. could then all be saved at the client, and the
> server would only send their arrangement.

Having font characters cached could also allow a reduction of percieved
latency while typing by having the viewer guess what to display before
it actually gets a screen update.  Citrix does this, and it is pretty
cool.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: Screen Resolution ???

[Michael Milette]

An alternative to the experimental scaling solution provided by other might 
be to simply use the VNC in full screen mode. You won't see the hosts full 
screen if your clients resolution is lower than the host but the scroll 
bars will be gone. Then simply move the mouse past the edge of the screen 
to move around the desktop. Moving around the desktop is very quick and a 
lot easier to than using the scroll bars.

Just don't forget to press CTRL-ESC-ESC to get the task bar back at the 
bottom of the screen.

         Michael

At 12:47 PM 2002-01-02, Keith wrote:
> I have a question not sure if this software package allows you to do
>this but I currently
> connect to a VNCserver (1280x764) with a laptop and I have to move
>the column bars
> around with the mouse to be able to see the whole screen.
>
> Is there anyway of changing the settings either on the laptop and or
>the PC running as the
> server to allow the client to to see the whole screen without using
>the mouse and the column
> bars 
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Re: Is there a way to use VNC on port 21

[Michael Ossmann]

On Fri, Jan 04, 2002 at 03:16:29PM -, Darren Rainer wrote:
> Hi, im afraid im not very technically minded with this. I used to have a
> connection between work and home with PC Anywhere. I then tried VNC and was
> amazed how much faster it was. Recently our Company have put a proxy server
> on the network which blocks all ports except port 21. Is there a way to get
> VNC to work on this port. If there is do I have to change the setup at both
> ends. Sorry for my ignorance.

You could run ssh on port 21 and tunnel VNC through ssh.  Zebedee would
probably work also, but I don't know it as well.  There is a document on
AT&T's VNC site about this kind of tunnel.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: IP filter with linux VNCserver

[Michael Ossmann]

On Fri, Jan 04, 2002 at 01:59:46PM +0100, Cherry wrote:
> 
> How can I allow some IPs and deny all other IPs to connect 
> to my vnc server?
> 
> I found an article on VNC homepage but the link was broken.
> 
> Perhaps (I think) it could be configured with a firewall but I'm
> a linux beginner soI can't do it.

You should be able to use either tcp wrappers, ipchains, or iptables.
Plenty of documentation is available online:

http://www.linuxdoc.org/HOWTO/IPCHAINS-HOWTO.html
http://www.linuxguruz.org/iptables/howto/iptables-HOWTO.html

If you are using a very recent version of Linux, then iptables would
probably be the preferred method.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: vnc w/ 4port Linksys DSL router

[Michael Milette]

At 05:18 PM 2002-01-05, you wrote:
>Question 1:   I understand that I have to set port forwarding on the dsl
>router setup to port 5900 (or 59xx), but what address do I plug in to be
>forwarded?  I presume I use one of the addresses supplied by my ISP, but
>do I use the IP address, the Primary DNS, the Gateway, or the Subnet
>Mask, or do I use the Destination LAN (DCHP) IP address?  I'm new at
>networking, and a bit confused as to which address to use.

1) The "Service Port Range" needs to be set to 5900~5900.
2) The protocol must be set to TCP.
3) The IP address is the address of the host machine you want to take over.

If this doesn't work, please note that you may have to open port 5800 as 
well if you are using the Java viewer in a web browser. Try looking though 
the FAQ's for more information. The FAQ can be found at 
http://www.uk.research.att.com/vnc/faq.html.

>Question 2:   The Linksys dsl router requires me to turn off DCHP to use
>Port Forwarding.  Am I loosing something important by doing this?

Check again. Unless you are using one of the BETA revisions of the 
firmware, you should not have to disable DHCP in order to enable port 
forwarding.

DHCP is used to assign each of the computers on your network a unique IP 
address. If all of the companies IP addresses are hard coded, you do not 
require DHCP.

Note that in some cases, DHCP will assign a different address to a machine 
when that machine requests or tries to renew its address. If this happen, 
you will not be able to VNC though the router as the address set under 
forwarding will no longer correspond to the right machine, if any at all. 
In this case, hard coded IP addresses will be the only way to ensure a 
consistent IP address. Note that only the machines running a VNC host you 
will be connecting to will require a hard coded address.

Finally, if you plan on connecting to more than one machine on your network 
though the Linksys, you will need to have them each setup on a different 
port. For example, Jack's machine will be listening for a VNC connection on 
port 5900. Larry's might be on 5901, Mary's on 5902, etc. In that case, you 
will have to add a port forwarding entry on the Linksys for each machine, 
also specifying the appropriate IP address for each machine.

>Question 3:   By opening up port 5900 on the dsl router, am I also
>opening up a hole in my firewall that a hacker (or whatever we're calling
>them) can detect and walk through?

Yes. Anytime you poke a hole in your firewall, you decreasing the level of 
security of your network. As port 5900 is a well known port for VNC, one 
thing you might consider is to change it to a non-standard port. This 
proposal is not foolproof but it will reduce the chances of being detected 
by someone specifically scanning for machines running VNC on port 5900.

>Thanks for your help.

You are welcome. Hope you find some of this helpful. Feel free to let The 
List know if you run into any problems.

 Michael
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Re: Netgear Router, Port 5900, Not Working

[Michael Milette]

At 06:07 PM 2002-01-05, you wrote:
>I have a Netgear Router on my DSL connection, I have routed port 5900
>to the machine where VNC Server is running ( Win98) with the latest
>download of VNC and I get no connection.
>
>If I connect across the local LAN using the 192. address, it works
>just fine so I know VNC is working.

Here are some suggestions:

1) When attempting to connect to your machine over the Internet, you must 
specify the IP address of your router, not the IP address of the host machine.

2) Make sure your VNC host server is not being assigned a dynamic IP 
address. Otherwise, the IP address of your machine at work may change by 
the time you get home in which case the configuration on the firewall would 
become invalid.

3) Telnet to your routers Internet IP address from home. Specify the IP 
address on the Internet as the host name, and 5900 for the port number. You 
should see "RFB 003.003" appear on the screen. If you do, VNC is responding 
correctly and the problem may be at the client end. If you don't, the 
problem could be either on the router or the host machine.

4) I know this is probably blatantly obvious but make sure your host 
computer is powered on when you try to connect. It is conceivable that 
someone is going around powering off the computers before leaving at night 
after you leave and turning them back on in the morning before you arrive.

5) If you are using the Java VNC Client from within a web browser, you will 
need to forward port 5800 as well as 5900.

6) Make sure VNC is waiting for a connection on port 5900 (display value 
should be "0").

7) Make sure nobody else is also connected to your host machine at the same 
time.

8) Find the following registry key exists. This registry key basically 
restricts which IP address can connect to your machine. If it does exist, 
export the branch (just in case) and then delete the AuthHosts key:

 HKEY_LOCAL_MACHINE\Software\ORL\WinVNC3\AuthHosts

9) Make sure your router is forwarding incoming (sometimes also called 
inbound) port 5900 to port 5900 at the LAN IP address (192.x.x.x) of your 
machine.

10) Come back after you have checked the above and ask again. If and when 
you do, please also include answers to the following questions:

 a) What exactly is the error message you are getting? Even when 
there is no connection, you still get an error message though it may take a 
few minutes.

 b) What is the speed of your clients connection? If it is too 
slow, VNC can actually crash your host computer if it takes too long to 
download the initial screen to the client. TightVNC has recently fixed this 
bug and may be a better alternative for slow modem connections.

 Hope you find some of this useful. Have a great day!

 Michael
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Re: VNC and Apache Reverse Proxy

[Michael Ossmann]

On Mon, Jan 07, 2002 at 10:08:10AM -0500, Christopher Tesla wrote:
>  
> I am using the Reverse Proxy functions of Apache to allow the users access to
> those servers.  The only problem is that when they click on the link they get
> the standard gray window and "Applet vncviewer class vncviewer could not be
> loaded" error.  This happens on the LAN as well as from the outside world.
> What is interesting is that when working on the LAN if I browse to
> http://apacheserver/vncserver (which should proxy forward to
> http://vncserver:5800) I get the error, but if I browse directly to
> http://vncserver:5800 it works just fine.  Obviously something is acting funny
> in the Apache config.

I think this is what is going on. . .

When you connect to http://vncserver:5800, the applet loads and tries to
open a vnc connection to vncserver:5900.  When you connect to
http://apacheserver/vncserver, the applet tries to open a vnc connection
to apacheserver:5900, which does not respond.  You can:

  1. Configure the applet to connect to a vnc server other than the web
  server.  You would have to use a signed Java applet to allow it to
  leave the sandbox, and this probably wouldn't ease your firewall
  configuration anyway.

  2. Use some kind of port forwarding on the apache server so that port
  5900 goes to the vncserver.  You would have to configure each
  vncserver to use a separate port number and allow external connections
  to apacheserver:5900-59xx.

  3. Get creative with ssh.

  4. Check out the VNC Reflector:
 http://sourceforge.net/projects/vnc-reflector/
 I haven't tried this yet myself, but I plan to soon.

Note that vnc is not at all secure unless you tunnel it through ssh,
zebedee, or something.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: SSH, VNC, Windows

[Michael Ossmann]

On Tue, Jan 08, 2002 at 04:36:19PM -0500, Boyd D. Mills wrote:
> 
> The requirement is to ENFORCE secure access to VNC through the web
> browser.  The first thing is to configure OpenSSH on the server
> machine to effectively sit between VNC server and the remote browser
> machine.  The second (hopefully two in the same) is to disable
> unsecure connections to VNC.

Take a look at the AllowLoopback and AuthHosts advanced options:

http://www.uk.research.att.com/vnc/winvnc.html

If you allow loopback access and deny all hosts except 127.0.0.1, you
can limit network access to those being forwarded by SSH.  This will
also allow unencrypted connections from the localhost, but that probably
is not a problem.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: SSH, VNC, Windows

[Michael Ossmann]

Yes, at least when you are using SSH for TCP port forwarding (which is
generally the case).

On Wed, Jan 09, 2002 at 10:56:19AM -0500, Alex Angelopoulos wrote:
> A semi-topical clarification question...
> 
> Is this the standard method for settting apps up to use SSH? "relay" through a 
>loopback to a local SSH service?
> 
> - Original Message - 
> From: "Michael Ossmann" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday/2002 January 08 19:56
> Subject: Re: SSH, VNC, Windows
> 
> 
> : On Tue, Jan 08, 2002 at 04:36:19PM -0500, Boyd D. Mills wrote:
> : > 
> : > The requirement is to ENFORCE secure access to VNC through the web
> : > browser.  The first thing is to configure OpenSSH on the server
> : > machine to effectively sit between VNC server and the remote browser
> : > machine.  The second (hopefully two in the same) is to disable
> : > unsecure connections to VNC.
> : 
> : Take a look at the AllowLoopback and AuthHosts advanced options:
> : 
> : http://www.uk.research.att.com/vnc/winvnc.html
> : 
> : If you allow loopback access and deny all hosts except 127.0.0.1, you
> : can limit network access to those being forwarded by SSH.  This will
> : also allow unencrypted connections from the localhost, but that probably
> : is not a problem.
> : 
> : -- 
> : Mike Ossmann, Tarantella/UNIX Engineer/Instructor
> : Alternative Technology, Inc.  http://www.alttech.com/
> : -
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> : -
> -
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> -

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Re: SSH, VNC, Windows

[Michael Ossmann]

On Wed, Jan 09, 2002 at 10:33:13AM -0500, Boyd D. Mills wrote:
> 
> There is a key described at http://www.uk.research.att.com/vnc/winvnc.html
> called LoopbackOnly.

Gee, how did I miss that?  Thanks.  :-)

> I was a little surprised that this key was not already created with the
> default of 0.  I had to create the key LocalMachine\Software\ORL\WinVNC\
> key: LoopbackOnly value 1.
>
> This does cause WinVNC to only accept connections from the local machine.

Bummer.  That sounds like a bug.  Has anyone else encountered this?

Did you try setting AllowLoopback and AuthHosts instead?  If that
doesn't work, you may need to resort to using third party "personal
firewall" software or set up a separate gateway system or firewall.
(Or, even better, fix the bug in WinVNC.  :-)

> But I need to configure the OpenSSH server to redirect incoming Browser
> connections to WinVNC.  That's the first major hurdle.

Ah, I missed that part in your first post.  This is trickier.  You do
need to have an SSH client running on the system with the web browser.
This can be an OpenSSH client that you use to turn on port forwarding
prior to making the VNC connection and then close again afterward, but
you would probably prefer to have the SSH client integrated into the
Java applet.  The only Java applet I'm aware of that does this is
mindvnc, which is part of the mindterm package.  I haven't tried the
commercial version which supports SSH2 (and I'm not even sure if it
still includes mindvnc), but a GPL version that only supports SSH1 is
being maintained by ISNetworks.  They have a nice signed Java archive
that is free to use:

http://www.isnetworks.net/ssh/

The example html page can be easily modified to run mindvnc instead of
mindterm:


 
This looks a lot like the vanilla Java VNC client but also sets up an
SSH tunnel.

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Re: SSH, VNC, Windows

[Michael Ossmann]

On Wed, Jan 09, 2002 at 10:39:41AM -0700, Michael Ossmann wrote:
> On Wed, Jan 09, 2002 at 10:33:13AM -0500, Boyd D. Mills wrote:
> > 
> > I was a little surprised that this key was not already created with the
> > default of 0.  I had to create the key LocalMachine\Software\ORL\WinVNC\
> > key: LoopbackOnly value 1.
> >
> > This does cause WinVNC to only accept connections from the local machine.
> 
> Bummer.  That sounds like a bug.  Has anyone else encountered this?

Oops.  I misread that.  Never mind.

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Re: Send Keystrokes with VNC

[Michael Ossmann]

On Wed, Jan 09, 2002 at 12:33:08PM -0500, Thompson, Dale W. wrote:
> Check out AutoIt at http://www.hiddensoft.com/AutoIt/index.html for a
> program that would make this task almost trivial to set up. And it's free.

Excellent!  I've been looking for something like this on Windows.  In
answer to the original question, you could also use rfbplaymacro
(available on freshmeat) if you have a Unix box to run it on.  I've been
using it to script VNC sessions for bandwidth testing and have had
success.

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Re: Borland's Kylix over VNC

[Michael Ossmann]

On Wed, Jan 09, 2002 at 12:04:07PM -0600, Bob Horton wrote:
> 
> Anyway, I've got Gnome coming up just fine and I seem to be able to run
> applications remotely without a problem (I tried Abiword and Freecell) but I
> get an Access violation error when I launch Kylix.  When I launch it on the
> console window it seems to run Ok ... although it doesn't seem completely
> stable so there might be problems with my install in other ways.

My guess is that Kylix has some sort of incompatibility with the Xvnc X
server.  You might try x0rfbserver:

http://www.hexonet.de/software/x0rfbserver/

I've never used it, but it might have a different X codebase that would
be compatible.

> I really need to get this working as soon as possible as the TV show is
> tonight and I only have a couple hours to get this working!

Good luck.  You may have to lug a Linux box to the studio.

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Re: Send Keystrokes with VNC

[Michael Ossmann]

On Wed, Jan 09, 2002 at 01:37:35PM -0600, Floyd Russell wrote:
> I tried rfbplaymacro and found it tedious to work with at best.

> If anyone has some good examples of rfbplaymacro I would be willing to 
> re-investigate it.

I've been doing this to create a script:

  rfbproxy -r --type=events --server=foo:0 script.rfb
  vncviewer :10

  I interact with vncviewer and rfbproxy records all the mouse and
  keyboard events.

To replay the script:

  cat script.rfb | rfbplaymacro foo:0

I often watch the script replay with:

  vncviewer -viewonly foo:0

It works great for me and is quite easy.  The only problem I've run into
is an apparent bug in rfbproxy which drops the letter "t" from its
output.  I plan on submitting a bug report to the author as soon as I've
had a chance to look at the source.  Meanwhile this gets me by:

  perl -pi -e 's/press  delay/press t delay/' script.rfb

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Re: Send Keystrokes with VNC

[Michael Ossmann]

On Wed, Jan 09, 2002 at 01:30:25PM -0700, Michael Ossmann wrote:
> 
> The only problem I've run into is an apparent bug in rfbproxy which
> drops the letter "t" from its output.  I plan on submitting a bug
> report to the author as soon as I've had a chance to look at the
> source.

Done.

# diff rfbproxy.c.old rfbproxy.c
440c440
<   end = p + strcspn (p, " =t");
---
>   end = p + strcspn (p, " \t");

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VNC will not go to full screen

[Michael Herron]

Hello.

I am running VNC on a laptop.  When the laptop is driving an 18"
external monitor, which it often does, then VNC will not go to full
screen.  When I select full screen, then the VNC window fills about
2/3 of the external monitor and the rest of the space on the monitor
is solid black.  I have also tried to expand manually the VNC window
by dragging on a corner, but this does not work.  I can only make the
VNC window cover 2/3 of the external monitor.

On the other hand, full screen mode works fine when the laptop is not
driving an external monitor. 

Any ideas on this?  

michael
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Re: TightVNC

[Michael Milette]

If you want to use it with Win9x/ME over a slow modem connection, I highly 
recommend TightVNC. Besides the compression, the latest release of TightVNC 
includes a bug fix which eliminates the drain and potential crashing of the 
VNC server during the initial transfer of the desktop image. After all, 
there is little point in crashing the machine you are trying to help.

Other than that, there are a few other enhancements included in TightVNC 
which are not part of the basic WinVNC.

Development and maintenance of TightVNC also appears to more active these 
days so bug fixes are more likely to be included in it although this could 
change at any time (who knows what those guys are up to).

So why use AT&T's VNC? The only reason that I can think of only affects you 
if you want to use it on a platform that is not supported. VNC is available 
for more platforms than any of its offsprings.

Don't forget to also consider TridiaVNC (http://www.tridiavnc.com/) if you 
are looking for something with official support. It has a similar set of 
features (if not more) to those included in TightVNC. If you run into any 
problems, you have the comfort of knowing you have someplace to call to get 
immediate help  in addition to discussion forums like this one.

         Michael Milette

At 09:50 AM 2002-01-10, you wrote:
>Just curious if anyone has use this version of VNC?  I am thinking about
>using it but how does it compare in the realworld to regular VNC?
>http://www.tightvnc.com/
>
>Andrew Krug, MCP
>IT Manager
>Academy of Managed Care Pharmacy
>100 North Pitt Street
>Suite 400
>Alexandria, VA 22314
>P:703.683.8416
>F:703.683.8417
>E:[EMAIL PROTECTED]
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Re: VNC will not go to full scree

[Michael Herron]

That does it.  Thanks!  Sent to list in case anyone else cares.

The X drawing is somewhat slow with such a big screen.  Is this due to
the (possibly somewhat slow) graphics chip on the laptop?

michael

Shing-Fat (Fred) Ma writes:
 > Is it possible that you're being limited by the desktop size
 > as defined by the server?  I VNC in from laptop viewer to
 > solaris server.  When I start the server on solaris, I specify
 > 
 >  -geometry 1400x1050
 > 
 > if I want my desktop to fill the whole screen when I put the
 > viewer in fullscreen mode.
 > 
 > Fred
 > --
 > Fred Ma
 > Department of Electronics
 > Carleton University, Mackenzie Building
 > 1125 Colonel By Drive
 > Ottawa, Ontario
 > Canada K1S 5B6
 > [EMAIL PROTECTED]
 > ==
 > 
 > > Date: Wed, 9 Jan 2002 15:52:29 -0500
 > > From: "Todd Seeleman"
 > > Subject: RE: Newbie Problem
 > >
 > > Greetings,
 > >
 > > I'd like to run both VNC and Terminal Services on a WIN2K Server
 > > but I find
 > > that connecting via VNC gives me a new screen rather than the server's
 > > console screen I'm seeking.  If I disable terminal services I then get the
 > > console screen.  I need to work with some open apps on the console screen
 > > but I'd also like to be able to use terminal services some of the time.
 > > Any
 > > ideas?
 > >
 > > Todd Seeleman
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Re: Offspring of VNC?

[Michael Milette]

Over the last few months, I have seen several variations mentioned here on 
the list. Unfortunately I have not been compiling a list for such an 
occasion. Though I am sure there are many more out there, here are some 
just off the top of my head:

At http://www.rabidpenguin.org/diversions.html you will find two versions 
of VNC: One that allows you to use IP authentication and another that uses 
NT authentication.

There is also another version that from 
http://www.smtechnologies.com/downloads.htm that authenticates against an 
NT domain.

I am not sure if it is actually a different version of VNC or not but 
http://fredrik.hubbe.net/win2vnc.html has something called Win2VNC that is 
basically a dual-screen VNC hack for Windows.

Of course we should not forget ZVNC, the ZeBeDee enabled version of VNC 
available from http://people.we.mediaone.net/ddyer/znc/zvnc.html

You can find these and others at 
http://www.uk.research.att.com/vnc/extras.html or on the "other platforms & 
environments" page at http://www.uk.research.att.com/vnc/platforms.html.

         Michael Milette

At 05:31 PM 2002-01-10, you wrote:
>Other offspring? What are the other spin offs of VNC? We have TightVNC, and
>TridiaVNC. Anything else?
>
>Andrew Krug, MCP
>IT Manager
>Academy of Managed Care Pharmacy
>100 North Pitt Street
>Suite 400
>Alexandria, VA 22314
>P:703.683.8416
>F:703.683.8417
>E:[EMAIL PROTECTED]
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Re: VNC and Apache Reverse Proxy

[Michael Ossmann]

On Fri, Jan 11, 2002 at 11:11:03AM -0500, Christopher Tesla wrote:
> 
> And presto I get the VNC login window!  I enter the password for the server
> into the field and click OK.  The browser status window shows "Applet
> vncviewer running", but nothing happens.  After nearly two minutes I finally
> get an error in the browser window that says "java.net.SocketException: Socket
> closed".  The Java Console gives me this:
> 

>
> Notice the lack of any mention of vncviewer.class!  Something is happening
> with the vncviewer.jar file and I have no clue what it could be.

Actually, vncviewer.class is inside vncviewer.jar, which is a Java
archive.  No worries.

> Does anybody know where I should go from here?  Is this a simple matter of
> pointing the requests for the various .jar and .class files to the proper
> place, or is something more serious happening?  When exactly does the shift
> from port 5800 to 5900 happen?  That may be the key to getting this to work.

Yes, you are getting exactly to the point (after typing in the username
and password) where it is trying to connect to port 5900.  My last
message applies at this point.  The port 5900 connection is the actual
vnc connection (RFB protocol) while the port 5800 connection is HTTP to
get the web page and java applet.  I didn't realize from your first
message that you hadn't even gotten this far, but your good debugging
work allowed you to get over your first hurdle.

If the configuration info in your first message is still true, you have
apache listening to 5900, so the applet is trying to make an RFB
connection and is getting HTTP in response.  Since HTTP begins with the
server waiting for the client to send a request and RFB begins with the
client waiting for the server to report a version number, you're getting
zero bytes transmitted and until apache finally times out.  That's why
you get the "java.net.SocketException: Socket closed" after a timeout
period.

At this point you need to try one of the methods in my last message,
unless someone has a better idea (which would be nice).

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Re: very strange speed problem with vnc 332r6 win32

[Michael Ossmann]

Certainly some testing of non-vnc services would be in order.

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Re: password for sharing the desktop

[Michael Ossmann]

On Fri, Jan 11, 2002 at 06:27:36PM +0100, Tomas Davidek wrote:
> 2. can one override the default minimal lenght of the password under Linux

Not without a change to the source, as far as I know.  It would be a
pretty simple change, though.

> 3. if so, is it possible to disable the password under Linux ?

If you use Xvnc directly (without the vnc-server wrapper) you can choose
to not use authentication at all (don't specify the -rfbauth file).  You
can also edit vnc-server to do this.  Just comment out the line that has
"rfbauth" in it.

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Re: newbie

[Michael Ossmann]

On Mon, Jan 14, 2002 at 01:10:30PM +0530, Jasmeet Singh Virdi wrote:
>   I am a newbie to this list. I just wanted to ask one question. What
> is the history of the RFB protocol ??

The protocol was developed by Olivetti Research Laboratory, now owned by
AT&T, for the VNC project.  The official home is here:

http://www.uk.research.att.com/vnc/

> and If i plan to use RFB protocol in one of my products do i need to make it
> Open Source ?? or for that matter make the source available to VNC ??

If you implement RFB from the ground up yourself, without using any open
source code, you do not have to make it open source.  If you use any GPL
code (such as the original VNC code), then you must GPL your product.

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Re: WinVNC 3.3.3r9 Memory Leak

[Michael Ossmann]

On Mon, Jan 14, 2002 at 11:50:49AM -, Steve Daly wrote:
>
> SOLUTION
> A workaround for Win95 use is to install the Winsock2 Upgrade.
> It would obviously be better to modify WinVNC so that it will work on all
> Winsock versions without leaking memory

> Any comments on the vailidity of caching the hostname would be appreciated

Sounds great to me, although I disagree with your classification of
solutions and workarounds.  The bug is in Win95.  Fixing the bug is the
solution.  Working around the problem in WinVNC is a workaround, but it
would be a welcome one.

Thanks for taking the time to figure this out.

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Re: RDP License

[Michael Ossmann]

On Mon, Jan 14, 2002 at 06:28:23PM +0530, Jasmeet Singh Virdi wrote:
>
>   If i develop an application based on RDP protocol, do i have make it
> open source ?? or for that matter reveal the source to VNC ??

VNC doesn't have anything (directly) to do with RDP.  If you want to
create a proprietary RDP application, I suggest licensing the protocol
specification from Microsoft.

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Re: Providing (Windows) VNC support to clients that have strict corporate firewalls

[Michael Ossmann]

On Mon, Jan 14, 2002 at 02:34:16PM -0500, Chuck Renner wrote:
> 
> There needs to be a way to change ALL Ports used by VNC, not just the ports
> it listens on.  Ports used for outgoing connections should be able to be
> changed both on the command-line, and through the GUI interface.  Since this
> isn't built-in, I had to build a small hack instead.

Most people who are concerned with firewall traversal are also concerned
about the very insecure protocol used by VNC traveling over the
Internet.  If you tunnel VNC through SSH on port 443, it solves both
problems.

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Re: Lets bundle forces

[Michael Ossmann]

On Mon, Jan 14, 2002 at 02:42:20PM +0100, Rudi De Vos wrote:
> 
> It seems that a lot of people are developping add-ons, improvements
> etc
> Why not combine forces and make VNC faster, more secure,...

This is not the first time this subject has come up in the short time
I've been on this list.  One of the more informative posts on this
subject:

On Sat, Dec 29, 2001 at 11:21:34 +, Till Adam wrote:
> 
> I think most of us in the vnc community agree, that the big problem
> vnc is facing at the moment is fragmentation. 

> The logical thing to do, in my opinion, would be to bring all these
> projects together (tightvnc, tridia, the hexonet folks, at&t of
> course, svnc, directvnc, fbvnc, the mac people the list probably goes
> on), and agree on a modularized design where encodings and frontends
> can be easily added and maintained. 
>
> This would probably best be done, I think, by initiating a new
> project, possibly on sourceforge or savannah, gather the people that
> want to help, and brainstorm away. After the design is agreed upon,
> everyone can go and write the module that encapsulates their specific
> platform or encoding. 
> 
> An alternative would be if AT&T would re-take responsibility for their
> baby and lead us in this effort. 

It seems pretty clear to me that AT&T does not have an interest in
really devoting resources to a general purpose community project.
They've opened the code, which is wonderful, but they don't actively
update the official release except with features that meet their own
needs.

> 1) this will probably collide with commercial interest on the part of
> some of the above mentioned folks working on vnc at the moment 

None of the commercial players have made enough of an effort to open a
dialogue with the community.  That's not to say they don't have great
products or that they haven't made great contributions, but they have
not created a de facto standard VNC distribution with a sizable amount
of community involvement.

> 2) I dont have a design written up yet and its probably a bad idea to
> come forward with this now without having thought through the details
> ;) 

Andrew van der Stock has certainly made some great headway in this area.

> Am I making sense with this? If so who'd be interested? Const?
> Anyone? 

I'm interested.  I've been familiarizing myself with VNC lately because
I am considering using it as a key component in a larger (bloated :-)
project.  If I go through with my project, I will definitely want to
have a standard and stable VNC distribution to rely upon, and I would
very much be interested in contributing in any way I can.

I propose that we either start a new project, get behind TightVNC, or
get behind Andrew's project.  Of all the open projects, Const's TightVNC
is the closest to being what we would like to see right now, but
Andrew's project is the closest to where we would like to be in the
future.

I would very much like to see the creation of a mailing list devoted to
the RFB protocol that is separate from any of the software mailing
lists.  Discussion and eventual standardization of a protocol
specification will be essential to success of a new project, and
Andrew's work is a great place to start.

It might be a good idea to choose a new name and announce the project
and goals.  How about OpenVNC?  Not that the original VNC code isn't
open, but our focus will be on having a very open and active development
process.  TightVNC is a fabulous starting point, but a more general
purpose distribution with broader goals would be appropriate.  If Const
is willing to take this on, I nominate him for project coordinator.  I'd
also like to see Andrew start the RFB mailing list and lead efforts (as
he already is doing) to standardize and implement the new protocol.  As
the new protocol implementation becomes stable, Const (or whoever the
project leader is) can make decisions about when to fold it into the
main release.  Andrew or others may also be appropriate project leaders.
Suggestions would be welcome.

Keep in mind that I am fairly new to this community.  Please feel free
to jump in and point out any stupid things I write.  I'd really like to
see this happen, so please make suggestions and/or voice your support or
dissent.

-- 
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Re: WinVNC 3.3.3r9 Memory Leak

[Michael Milette]

I am not sure if you are referring to the resource memory leak but if so, 
it was fixed in the latest version of TightVNC.

 Michael

At 07:57 AM 2002-01-15, you wrote:
>IMO also it is a classic (and well-known) WIn95 bug; on the other hand, 
>the "fix" from VNC is what I perceive as a classic Unixish
>apporach where a component takes on more thanit's share of the burden in 
>resolving a problem.
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Re: Lets bundle forces

[Michael Ossmann]

On Tue, Jan 15, 2002 at 12:34:13PM +1100, Andrew van der Stock wrote:
> 
> Although I have a derivative on sourceforge called "SecureVNC", think of
> this as proto-"VNC 4.0". I am not interested long term in being a VNC
> author / maintainer - my focus has always been security. 

Your focus on security and on improving the protocol for all is exactly
why I would like to see more people support your project.  If you would
start a new RFB discussion list or simply promote your existing list as
a discussion of the future of RFB, I think the community would benefit
greatly.  I think what you are already doing is fantastic, but it would
be nice if we could improve the visibility of your project and get more
people involved in the protocol discussion.

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Re: Lets bundle forces

[Michael Ossmann]

On Tue, Jan 15, 2002 at 01:03:54PM +0100, Rudi De Vos wrote:
> Const's TightVNC  is essential, but the tight version is not a good
> starting point.

Why is that?  Because it is not as modularized as we would like?  Is
there a better starting point, or do you think it would be best to build
a new code base from the ground up?  I'd certainly like to see as much
reuse as possible.

> Encoders should be plug-ins (client and server site).The same for
> authentication and other stuff.

Agreed.

> Take a standard VNC (ex AT&T) and modified it to use plug-ins.  So
> everybody can work on the parts and platforms they know the best,
> encoders authentication, ssh,scaling

I'd like to see the protocol support provided by LibVNCServer
[http://libvncserver.sourceforge.net] or something like it.  Having a
library that other projects can use would be a good thing.

> My focus is speeding up winvnc-server

Excellent.  My experience is more on the Unix side, but my focus is to
do what I can to help the emergence of a de facto standard VNC
distribution and ease the fragmentation woes.

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Re: newbie

[Michael Ossmann]

On Tue, Jan 15, 2002 at 12:50:16PM +0530, Jasmeet Singh Virdi wrote:
> Hi,
>Does that mean that i can modify the protocol to incorporate a new
> compression technique (that i developed) and not make anything visible to
> the public and sell that product ?

Yes, as long as your source code is all yours.  If you modified source
code that is licensed under the GPL, then you cannot do this.  The
protocol itself is not protected by any licensing.

Someone please correct me if I am wrong.

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Re: Providing (Windows) VNC support to clients that have strict corporate firewalls

[Michael Ossmann]

On Tue, Jan 15, 2002 at 10:10:18AM -0500, Chuck Renner wrote:
> 
> WinVNC on ClientWS1 ---> SSH on ClientWS1 port 5500 --> Internet --> sshd on
> MYFirewall port 443 --> VNCviewer on MyWS1 port 5500
> 
> Have I got the idea right?  If so, I should be able to do this without
> recompiling VNC at all.

Yup.  Of course your situation is somewhat complicated by the fact that
you have no control over one of the firewalls, but the solution you
described should work fine.

> I just need some help with SSH in Windows and sshd on the Linux machine.  I
> have no idea on how to do this forwarding/tunneling with SSH.  I have never
> used SSH for anything but a shell window before (and SCP for file transfer).

I don't know the Windows SSH tools very well, but, if you find one that
behaves like OpenSSH on Unix (I think there actually is an OpenSSH for
Windows too), then you would initiate the connection from the Windows
box with something like:

ssh -nq -i key -l vnc -p 443 -L 5500:MyWS1:5500 MYFirewall sleep 30

Where "key" is a private key file which allows sshd to authenticate the
ssh client without the user typing a password, "vnc" is a user account
with no privildges on your firewall setup just for this purpose (and
with the public side of "key" installed), "MyWS1" is the local IP
address of your VNC client, and "MYFirewall" is the public IP or FQDN of
your firewall with sshd running.  You can also give ssh the -C option to
turn on compression, which is a huge bonus if you are using anything
slower than tight encoding or zlib encoding on the VNC connection.  Your
sshd default configuration will probably be fine except that you need to
tell it to listen on port 443.  The "sleep 30" just opens up a 30 second
window for the VNC connection to get started.

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Re: Insecure VNC through corporate firewalls

[Michael Ossmann]

On Mon, Jan 14, 2002 at 06:49:08PM -0800, Dave Dyer wrote:
>   Just a reminder to those concerned about the inherent insecurity
> of VNC protocols ( and those who would recommend tunneling with SSH )
> I've produced a version of VNCViewer and WinVNC which automatically 
> use a secure connection.  I've got lots of users and no complaints:

Do you have any interest in working on the other project we're
discussing and/or making an encryption plugin for it?

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Re: VNC Server setup on Linux

[Michael Ossmann]

On Tue, Jan 15, 2002 at 12:06:27PM -0600, Joel Sherrill wrote:
> 
> I now have gotten far enough to get a grey screen on each of the
> ports I have tried but no login screen.  I am getting a message
> like this in /var/log/messages each time I get a grey screen 
> so I must be close. :)
> 
>   gdm[PID]: Failed to start X server several times in 
> a short time period: disabling display:0

Sounds like gdm is configured to start multiple X servers.  It shouldn't
be starting X servers but listening for other X servers to connect.

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Re: RFB hackers protocol list

[Michael Ossmann]

Woohoo!  Thanks for setting this up, Andrew.

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Re: AIX

[Michael Ossmann]

On Wed, Jan 16, 2002 at 04:29:52PM +0800, Daniel Tan wrote:
> Hi all,
>  i am using AIX and why i cant connect through xdmcp? it is listed
> in my services file but it seems like i am having trouble connecting to
> it...anyone have any steps to configure AIX for xdmcp?

Try this:

http://doc.server.uni-frankfurt.de/doc_link/en_US/a_doc_lib/aixbman/baseadmn/cde_display.htm

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Re: strg-alt-del with linux?

[Michael Ossmann]

On Wed, Jan 16, 2002 at 03:51:21PM +0100, Werbinek, Florian wrote:
> 
> how do i send crtl-alt-del with the vnc viewer for linux?

F8

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Re: Alt key not recognized in VNC session

[Michael Ossmann]

On Wed, Jan 16, 2002 at 02:38:51PM -0500, Frank S. Kim wrote:
> 
> However when I start XEmacs in a VNC sessioni and press the Alt key, XEmacs
> complains that it does not recognize the Alt key.  This is not a problem
> though when I run a regular KDE session directly on my Linux desktop.

I don't know the whole story behind this, but here's a clue.  I've
noticed this in TightVNC's Xvnc man page:

  -compatiblekbd
  Set META key = ALT key, as in the original (AT&T) version of Xvnc.

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Re: Providing (Windows) VNC support to clients that have strict corporate firewalls

[Michael Ossmann]

On Wed, Jan 16, 2002 at 02:40:16PM -0500, Chuck Renner wrote:
> 
> Since VNCviewer states, "Internal loopback connections are not allowed", the
> implication is that there is a setting that WILL allow them, either in the
> source, or in the GUI settings.  Is this the case?

I wasn't expecting this.  I have no idea why loopback connections
wouldn't be allowed, and I suspect a source code change would be
required to change it.  Anyone?

>   2.  Opening the SSH connection from the client to the SSHD your Linux
> firewall is effectively like creating a VPN connection from the client to
> your network.  This opens a huge security hole in your network, and gives
> someone on the client's network the ability to snoop around your network
> when the connection is made.

One of the advantages of using public key authentication is that OpenSSH
can limit port forwarding to particular host:port combinations specified
by the permitonly option in the authorized_keys file.

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