one application sharing

[Naama Shalom]

Hello,
I want to know if any one has the one application sharing source code ?
Thanks ,
Naama


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WinVNC + Registry (was Re: Secure Windows)

[Richard Harris]

> First, securing VNC (or anything) is a process, not a matter of simply
> using some program or other. Several parties to this list have pointed
> out other aspects besides securing the communication stream that are
> known to be points of attack; for example, VNC's use of the windows
> registry to store passwords.

The registry isn't that secure on 9x clients, but on NT/2000 (don't know about 
XP) you can set user permissions on certain reg keys.

I've tried this with WinVNC - allowing on administrations and the system access 
to the WinVNC3 branch and below - and it seems to work fine. 

If anyone want to try this on a number of PCs so we can spot any bugs, that 
would be very helpful.

Would the VNC settings for Windows be better stored in a file (like unix?). On 
systems with NTFS, you could set permsisions to only allow services, admin 
and system to view the file.. but is that any more secure than CACLing the 
reg?

It doens't help anyone on 9x though, sorry!!



Later,
Richard

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Richard Harris
Environment IT, NCC
Ext 4509
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Re: NT crash when no user is logged in

[fd.brouwer]

Yes, a real blue-screen crash. The NT-kernel crasht. But some gay from
another school came withe the solution. Withe the last upgrade we disabled
the vnc-viewer en directly upgrade it with a new one. One DLL whas in use
and not replaced with the niew one. result--> a blue-screen. Now we have
uninstalled the vnc server and then installed the new one and everything
works wel.

FB
- Original Message -
From: "Alex Angelopoulos" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 06, 2002 4:31 PM
Subject: Re: NT crash when no user is logged in


> You get a real blue-screen crash?  What is the faulty driver shown?
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Re: Accessing a machine on the Intranet?

[Richard Harris]

Hi,

> I would like to be able to access a machine that is on the Intranet
> from the outside.  Basically what I have is a Linux gateway machine
> which allows me to login from the Internet and to connect to the
> Intranet.  One of the machine on the Intranet is a Windows NT machine
> which I need to be able to access in order to to be able to remotely
> start/stop stuck services.

If you've got a linux gateway going, why not use SSH and make a tunnel from 
your external machine and have the linux box forward that out to the NT box's 
IP address / DNS or WINS name. This is what one of my work mates does to 
control his home machine.

BTW, if your NT box is 2000 - you should use telnet server to view service 
status, but telnet is insecure, so you'd probably only want to do that once you'd 
SSH'd into your linux system (and even then, it won't be secure locally).

Later,
Richard

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Environment IT, NCC
Ext 4509
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Re: Accessing a machine on the Intranet?

[Constantin Kaplinsky]

Hello,

> "AS" == Avi Schwartz <[EMAIL PROTECTED]> writes:

AS> Hi, If this was answered before, I apologize and a reference to
AS> that answer will suffice.

AS> I would like to be able to access a machine that is on the
AS> Intranet from the outside. Basically what I have is a Linux
AS> gateway machine which allows me to login from the Internet and to
AS> connect to the Intranet. One of the machine on the Intranet is a
AS> Windows NT machine which I need to be able to access in order to
AS> to be able to remotely start/stop stuck services.


AS>   [A]--->[B]->[C]
AS> Outside  GW Windows
AS>  Linux  Linux

AS> The Windows machine is NOT visible from the outside.

If you use Linux on the viewer side, try using TightVNC vncviewer and
its -via option (available only in the Unix version). Do it like this:

  vncviewer -via GATEWAY 192.168.1.100

Here GATEWAY should be replaced by the real host name or IP address of
the gateway machine, and the 192.168.1.100 address should be replaced
by real IP address or host name of the Windows machine. The latter
address should be written as known to the gateway (it may be not known
to the viewer machine).

This command assumes that you have SSH client in /usr/bin/ssh on the
viewer side, and you have SSH server installed on the gateway. Also,
SSH tunneling assumes that you have valid SSH-enabled login on the
gateway.

AS> Is there a way to use VNC with some kind of a 'redirector' on the
AS> GW machine so that I can control the Windows box from the outside?

Yes, there is a sort of VNC redirector:

  http://sf.net/projects/vnc-reflector/

But, I think, in your situation it's better to use SSH port forwarding
(as when using the -via option), or to setup port redirection on the
Linux gateway using ipchains/iptables/NAT (I'm not sure how people do
it these days).

-- 
With Best Wishes,
Constantin
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Re: Accessing a machine on the Intranet?

[Avi Schwartz]

This is perfect!  Thanks for the pointer to the article.

Avi

--On Thursday, February 07, 2002 07:25:49 AM + "Scott C. Best" 
<[EMAIL PROTECTED]> wrote:

> Avi:
>   Heya. Since you're using Linux, this problem turns out to be
> pretty easy for you: use SSH. Most of the time, SSH is used as a
> "secure telnet". But it has the great capability of being a secure
> tunnel as well.
>   There's actually a page about it on the VNC website:
>
> http://www.uk.research.att.com/vnc/sshvnc.html
>
>   Skip down to the "More Advanced Use" and I think you'll
> see a network picture that looks eerily familiar. :)

-- 
Avi Schwartz
[EMAIL PROTECTED]

"I have to share the credit. I invented it, but Bill made it
famous." - IBM engineer Dave Bradley describing the
control-alt-delete reboot sequence
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vnc viewer fails but java client OK

[Paul Gleave]

Can anyone help me with this please:

My vnc client (ie the viewer) has mysteriously stopped working: the
server is on another PC on the LAN. I get the 'failed to connect to
server' error.

I can access it using the java client (http://192.168.0.14:5805), but
not on the vnc viewer client, (192.168.0.14:5)

I can telnet to the server machine on port 5905.

I'm convinced the problem is on my own (Win2k) PC as I cannot access
other VNC servers using the viewer either, including my own PC's one
(whereas I can using java).

As I say, it was working fine, but now it has stopped, and I haven't
(knowingly) made any changes to my own PC.

Any thoughts on how I can solve this (or at lease diagnose the problem
further) would be appreciated.

Thanks

Paul
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Re: Secure Windows Connection

[Kurt Frank]

If you could, please put me on a mailing list for your How-To.  Sounds like a great 
idea.

-- Original Message --
From: Jeff Baldwin <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Date: Tue, 05 Feb 2002 17:08:17 -0500

>Ok.. I have seen this topic aeveral times on this list, and each time it 
>seems it has come to a somewhat unclear conclusion (at least in my 
>mind).  Finally, I have run into the same road block as many others, I 
>have numerous VNC Servers on 'our' network and the idea of insecure 
>communications across the network is really starting to 'irk' me.
>
>With the information I gain/apply here, I will write up a complete howto 
>for securing VNC connections.  Ok.. w/ that said, I now have to ask some 
>questions..
>
>What is the 'best' most secure way to communicate w/ VNC Server on a 
>network?
>
>Most of my clients are Windows users, however I use ONLY Linux and have 
>many spare Linux boxen that I could use as 'middle men' if neccesary to 
>port forward the SSH connection.
>
>So, basically all I'm looking to do here is find out how to secure a VNC 
>connection, should I use the browser interface, ssh, etc..??
>
>Thanks
>
>Jeff
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deep in enemy ground, they are united. When there are no other alternatives, they will 
fight. Therefore, though not disciplined, they are alert; though not asked, they are 
devoted; though without promises, they are faithful; and though not commanded, they 
are trustworthy. Prohibit omens, and get rid of doubts, and they will die without any 
other thoughts."
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RE: Macintosh PPC - Run as a Hidden Process

[Jonathan Morton]

>I remember a tool called KeepItUp
>that ran in the background on the Mac and was tied to certain apps.  When you
>tried to close an app that was monitored, KeepItUp would prevent it from
>closing.

This looks like the solution most people actually need, provided the 
tool still exists and works correctly.  My guess is that it patches 
the AppleEvent handler and ExitToShell(), which should be standard 
interfaces.

BTW, thanks Adrian for pointing out my archived response to a similar 
question.  As you might be able tell, I feel quite strongly about 
this.

-- 
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Re: one application sharing

[Michael Ossmann]

On Thu, Feb 07, 2002 at 12:01:42PM +0200, Naama Shalom wrote:
>
> I want to know if any one has the one application sharing source code ?

http://services.simac.be/vnc/single/

This is for WinVNC only.
-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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Windows Logging

[Patrick Calvert]

I am researching the use of VNC to replace another product.  The only thing
the other product does that VNC doesn't is when someone connects to a system
the hosting systems logs the computer name of who connected into the
application log.  Has anyone come up with an add-on that performs this
function?
Thanks,
Patrick Calvert  
MCSE Windows NT 4.0MCP Windows 2000
Senior Desktop Support
SMUD (Sacramento Municipal Utility District)
(916) 732-5220   Fax: (916) 732-5940
6201 S Street, Sacramento, CA 95817-1899
PO Box 15830, Sacramento, CA 95852-1830
  [EMAIL PROTECTED]

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Re: Windows Logging

[Michael Ossmann]

On Thu, Feb 07, 2002 at 11:20:05AM -0800, Patrick Calvert wrote:
> I am researching the use of VNC to replace another product.  The only thing
> the other product does that VNC doesn't is when someone connects to a system
> the hosting systems logs the computer name of who connected into the
> application log.  Has anyone come up with an add-on that performs this
> function?

Take a look at DebugLevel and DebugMode in the WinVNC documentation:

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

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

[Michael Milette]

Though I have never used it myself, there is something about logging in 
TightVNC in the advanced settings dialogue box (which is not part of the 
basic WinVNC server by the way).  It might be what you are looking for. The 
only thing is that it logs to a file instead of the NT Application log.

 Michael Milette

At 03:02 PM 2002-02-07, you wrote:
>Subject: Re: Windows Logging
>To: [EMAIL PROTECTED]
>
>On Thu, Feb 07, 2002 at 11:20:05AM -0800, Patrick Calvert wrote:
> > I am researching the use of VNC to replace another product.  The only thing
> > the other product does that VNC doesn't is when someone connects to a 
> system
> > the hosting systems logs the computer name of who connected into the
> > application log.  Has anyone come up with an add-on that performs this
> > function?
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VNC Server with 2 video cards/displays

[erikcw]

Hi Everyone,
I have a Win2k machine with 2 video cards/monitors that is running VNC
Server.  When I try to connect, I am only able to view one of the displays. 
Is there a way to view both or to switch between the video cards?  The main
problem is that the taskbar is on the display that my VNC client is not
conecting.  Any help is greatly appreciated.

Thanks,
Erik
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viewer shows screen for a second, then disappears

[Uncle Tomacco]

[demime could not interpret encoding binary - treating as plain text]
Hi!

I got the following problem:

the vnc server runs on a windows 2000 machine, the viewer on a windows 98 computer. 
when i connect to the windows 2000 machine while the admin is logged in on that 
machine everything works perfectly. but when a normal user is logged in on the server, 
the viewer displays the scree for about a second and then disappears. this is no crash 
- the viewer is terminated correctly. here's the strange thing: the screen does not 
instantly disappear when i move the mouse around. the viewer stays open as long as i 
move the mouse and disappears 1 second after i stopped moving it. giving the user on 
the 2k machine admin rights doesn't change a thing, it only works with the 'true' 
admin ... strange, isn't it? i think it might have something to do with the registry 
but my win 2k knowledge is limited. i hope you have a clue what this might be...

thanks in advance!


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No keyboard/F8 on dual-headed Linux client

[Mike Cooper]

I'm running WinVNC (3.3.3r2 on client and server) from a WinXP desktop and 
displaying to a Red Hat 7.2 (XFree 4.1.0, Ximian GNOME 1.4) desktop with 2 
displays (2 graphics cards + 2 monitors).  When I run vncviewer on display 0 
it works fine.  When I run it on display 1 everything except keyboard events 
work.  I cannot type into any application on display 1 nor does F8 work.  The 
mouse works fine, though.

Anybody have any suggestions?

mike
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Re: Macintosh PPC - Run as a Hidden Process

[Dan Harrison]

>Good luck having someone answer a MAC question, I think we have mostly PC
>users here.
True, but please don't spread doubt. Thanks.

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RE: one application sharing

[AceMiles, Inc.]

How do you download it?

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-Original Message-
From:   Michael Ossmann [SMTP:[EMAIL PROTECTED]]
Sent:   February 07, 2002 11:18 AM
To: [EMAIL PROTECTED]
Subject:Re: one application sharing

On Thu, Feb 07, 2002 at 12:01:42PM +0200, Naama Shalom wrote:
>
> I want to know if any one has the one application sharing source code ?

http://services.simac.be/vnc/single/

This is for WinVNC only.
-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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