Hi,
i wrote:
> > mknod ~/fifo p
> > netcat -u PORT1 <~/fifo
> > data_producer | tee -i ~/fifo | netcat -u PORT2
Paul Duncan wrote:
> I shall give that a go
I forgot to mention that i ran my test mockup of the last two commands
concurrently in t
Hi,
Paul Duncan wrote:
> what the best way is to send it to two IP addresses?
If it must happen without much time to study the web, i'd use tee(1)
to feed a named pipe from the unnamed one. Then netcat can consume both.
mknod ~/fifo p
netcat -u PORT1 <~/fifo
data_producer | te
Hi All,
Not strictly speaking an OS dependent question, but I figured someone on
this list would probably have an answer :-)
I have a program generating output to standard out, which I am then piping
to netcat -u IP Port
This works fine, but I'm wondering what the best way is to send it t
On 24/02/2014 10:21, Brian wrote:
> the OP could consider doing (as root)
>
>setcap cap_net_bind_service=+ep /usr/bin/ncat
>
> as a solution to his problem.
If they do, they should be aware that would essentially permit any user
on the machine to bind to any port; since nc is a redirection s
little different, but there are also netsed, netrw etc.
>
> And the excellent crypcat - but I just counted the ones with netcat in
> their name (in case the OP was, um, fussy about it), not necessarily
> their functionality. I don't know what the actual criteria for being
> "net
cat - but I just counted the ones with netcat in
their name (in case the OP was, um, fussy about it), not necessarily
their functionality. I don't know what the actual criteria for being
"netcat" is, for me if it does the job and is in /etc/alternatives I'm
happy.
Kind regards
I'd include socat in the list, but perhaps it's command line options
are different? socat is my preferred network swiss army knife.
A little different, but there are also netsed, netrw etc.
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On 24/02/14 15:44, Peter Easthope wrote:
> References:
> <530a9882.4040...@gmail.com>
>
> From: Scott Ferguson
> Date: Mon, 24 Feb 2014 11:55:30 +1100
>> NOTE: there four different "netcats" available in Wheezy.
>
> I found three.
> netca
References:
<530a9882.4040...@gmail.com>
From: Scott Ferguson
Date: Mon, 24 Feb 2014 11:55:30 +1100
> NOTE: there four different "netcats" available in Wheezy.
I found three.
netcat-openbsd, netcat-traditional, netcat6.
netcat-openbsd pleads ignorance.
peter@dalton:~$ n
n, 23 Feb 2014 19:43:12 +
>> Which netcat are you using?
>
> [user@computer ~]$ nc --version
> Ncat: Version 6.40 ( http://nmap.org/ncat )
>
>> Mine (which I will not reveal :) ) does does not offer -e as an option.
>
> -e is a contentious option?
Contentious
David Glover-Aoki a écrit :
>
> Only the superuser can bind to ports below 1024.
Actually not. It just requires that the process has the
CAP_NET_BIND_SERVICE capability.
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Brian
> Date: Sun, 23 Feb 2014 19:43:12 +
> > Which netcat are you using?
I asked a question - which you didn't answer. I'll ask another one after
answering the two you ask.
> [user@computer ~]$ nc --version
> Ncat: Version 6.40 ( http://nmap.org/ncat )
>
>
References: <9802e1a04541ccc2a9d2c5d8b89c6c0f.squir...@easthope.ca>
<23022014193900.3e6e4cc30...@desktop.copernicus.demon.co.uk>
I'll be putting References in the header again soon.
From: Brian
Date: Sun, 23 Feb 2014 19:43:12 +0000
> Which netcat are you using?
[user@comput
On Sun, 23 Feb 2014 09:15:59 -0800
"Peter Easthope" wrote:
> Ncat: bind to :::25: Permission denied. QUITTING.
Only the superuser can bind to ports below 1024.
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Description: PGP signature
On Sun 23 Feb 2014 at 09:15:59 -0800, Peter Easthope wrote:
> Can anyone offer a solution for this?
>
> [user@computer ~]$ nc -l 25 -e /usr/sbin/ssmtp
> Ncat: bind to :::25: Permission denied. QUITTING.
Which netcat are you using? Mine (which I will not reveal :) ) does does
not of
"Peter Easthope" writes:
> Can anyone offer a solution for this?
>
> [user@computer ~]$ nc -l 25 -e /usr/sbin/ssmtp
> Ncat: bind to :::25: Permission denied. QUITTING.
Maybe you need to be root? I doubt regular users can bind to ports below
1024.
-- Mark
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Can anyone offer a solution for this?
[user@computer ~]$ nc -l 25 -e /usr/sbin/ssmtp
Ncat: bind to :::25: Permission denied. QUITTING.
Thanks,... Peter E.
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Hello,
A port number identifies a process running in your machine, then is implicit
that a process must be running and listening on that port. When your netcat
try to connect it will probably receives an ICMP packet advertising the
"Connection Refused" or an TCP segment with the fla
On 11/10/12 09:53, houkensjtu wrote:
> It seems that, not only on the router, but also I should open a specific port
> on my laptop, otherwise netcat will not be able to connect from outside my
> home.
>
> I wonder why this happens and what is the mechanism behind it.
> Is it
on my laptop.
Now I can access my laptop from office by ssh USER@my_home_external_ip.
Also, scan port by using netcat from office:
nc -vz my_home_external_ip 22
gives me:
Connection to my_home_external_ip port [tcp/ssh] succeeded!
Today, I tried to open another port on my router, let me call it
2012/10/11 houkensjtu
> Thanks Joe, Brian, Murphy
>
> As I post above, I forgot to say all these experiments were done in my
> home on my laptop...
> Now I am in my office and re-do all this experiment.
> To be short, now all experiment which is done with ip address works well,
> while if I do ss
Thanks Joe, Brian, Murphy
As I post above, I forgot to say all these experiments were done in my home on
my laptop...
Now I am in my office and re-do all this experiment.
To be short, now all experiment which is done with ip address works well, while
if I do ssh USER@DEBIAN, it will say:
ssh: C
On Wednesday, October 10, 2012 08:19:25 PM houkensjtu wrote:
> Thanks for great reply!!
> I have to apologize for sth... I forgot to say that all these experiments
> were done in home on my laptop...omg So, now I solved the problem with
> echo "1">/proc/sys/net/ipv4/ip_forward
>
> What is this fil
Brian於 2012年10月11日星期四UTC+9上午8時00分04秒寫道：
> On Wed 10 Oct 2012 at 08:35:13 -0700, houkensjtu wrote:
>
>
>
> > I am a newbie both of debian and networking... Recently I am trying
>
> > to connect my home laptop(I have a router in my home) from office. I
>
> > read several articles on port forwar
Hi Joe!
Thank you for detailed reply!
Actually I found a switch which solved my problem and now all my experiments
works perfectly. The command is:
echo "1">/proc/sys/net/ipv4/ip_forward
but...What is it?! Is there any other way to check and configure my laptop's
status without writing directly
On Wed 10 Oct 2012 at 19:44:27 +0100, Joe wrote:
[Some good advice snipped]
> However you resolve the initial problem, the ssh server is very heavily
> targeted by the bad guys, using password checking bots. A quick and
> dirty security measure is to forward a non-standard high numbered
> externa
On Wed 10 Oct 2012 at 08:35:13 -0700, houkensjtu wrote:
> I am a newbie both of debian and networking... Recently I am trying
> to connect my home laptop(I have a router in my home) from office. I
> read several articles on port forwarding. And I succeeded in opening
> an 22 port on my router, al
On Wed, 10 Oct 2012 08:35:13 -0700 (PDT)
houkensjtu wrote:
> Hi debianer!
> I am a newbie both of debian and networking...
> Recently I am trying to connect my home laptop(I have a router in my
> home) from office. I read several articles on port forwarding. And I
> succeeded in opening an 22 por
http://www.catb.org/esr/faqs/smart-questions.html
A bit of searching the net on port-forwarding oughta give you the answer.
You probably forgot to forward port 22 on the router to whichever ip
adress your DEBIAN has.
Search around for stuff on your router/ISP combo as they're almost
always blocked
Hi debianer!
I am a newbie both of debian and networking...
Recently I am trying to connect my home laptop(I have a router in my home) from
office. I read several articles on port forwarding. And I succeeded in opening
an 22 port on my router, also I started ssh server on my home laptop.
(suppos
listening simply by connecting to the port. This is documented in
the netcat man page:
CAVEATS
UDP port scans will always succeed (i.e. report the port as open),
rendering the -uz combination of flags relatively useless.
Chris
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g udp datagram :
$nc -uvvz
-z zero-I/O mode [used for scanning]
it does not output any thing. i have straced the udp daemon. which does
not returns from recv() call.
my goal is to put arbitrary data on the udp socket by netcat. i do not
have any experience regarding netcat so i
t any thing. i have straced the udp daemon. which does
not returns from recv() call.
my goal is to put arbitrary data on the udp socket by netcat. i do not
have any experience regarding netcat so i'm asking if anyone can help me
out with this.
thanks in advance.
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"Y
On Wed 24 Aug 2011 at 10:24:55 +0100, Joao Ferreira Gmail wrote:
> Does anyone know if there is any kind of support in netcat to implement
> multiclient with a multitasking/multithreading server...(several clients
> being accepted and served concurrently)
>
> or any other simila
On 24/08/11 19:24, Joao Ferreira Gmail wrote:
> Hello all,
>
> Does anyone know if there is any kind of support in netcat to implement
> multiclient with a multitasking/multithreading server...(several clients
> being accepted and served concurrently)
>
> or any other
> >
> Nice tip, Tod. But the idea was keeping a connection open, to get client
> informed by server that something happened.
>
> Anyway, looking in netcat sources yesterday I found the reason of that
> behavior. It uses the "execl" system call to run -e program (the vers
xit when it's done dumping /var/log/syslog and the
> next time someone connects it should pick up where it left off.
>
> Regards,
> Tod Detre
>
>
Nice tip, Tod. But the idea was keeping a connection open, to get client
informed by server that something happened.
Anyway, lookin
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Paulo Brito wrote:
> Thanks for de tips about top posting. I"ll remember
>
> Michael, -w option dont make nc returns if a conection is already
> stablished.
>
> I've tried this: nc -l -p 5558 -c bash. And it works! I think the big
> probleam is that
2009/2/11 Michael Iatrou
> When the date was Wednesday 11 February 2009, Paulo Brito wrote:
>
> > 2009/2/11 Michael Iatrou
> >
> > > When the date was Wednesday 11 February 2009, Paulo Brito wrote:
> > > > I"m trying to setup netcat so it serves
When the date was Wednesday 11 February 2009, Paulo Brito wrote:
> 2009/2/11 Michael Iatrou
>
> > When the date was Wednesday 11 February 2009, Paulo Brito wrote:
> > > I"m trying to setup netcat so it serves logs to other systems. When
> > > a client conne
u'll
> see
> > that the problem is netcat NOT exiting after disconnect. So, your script
> > will not solve the problem, because the nc never exits.
> >
>
> Will -w option work?
>
> --
> Regards,
> Sudev Barar
> Read http://blog.sudev.in for topics rangi
Michael, thanks for your reply. But if you read my entire email, you'll see
that the problem is netcat NOT exiting after disconnect. So, your script
will not solve the problem, because the nc never exits.
Thanks anyway.
2009/2/11 Michael Iatrou
> When the date was Wednesday 11 Febru
When the date was Wednesday 11 February 2009, Paulo Brito wrote:
> I"m trying to setup netcat so it serves logs to other systems. When a
> client connects, the server starts to send some logs.
>
> I run netcat in listem mode like this:
>
> # nc -l -p 5558 -c "tai
I"m trying to setup netcat so it serves logs to other systems. When a
client connects, the server starts to send some logs.
I run netcat in listem mode like this:
# nc -l -p 5558 -c "tail -f /var/log/syslog"
the client I run like this:
# nc 5558
The problem is that the serve
Hi, I am using netcat to help
me send backups to and from machines with different operating systems.
I am using:
To Backup...
dd if=/dev/"Device" | gzip -9 | nc "Destination"
"Port"
Assumes nc -l -p "Port" >"Image File
Name"
Hi, I am using netcat to help
me send backups to and from machines with different operating systems.
I am using:
To Backup...
dd if=/dev/"Device" | gzip -9 | nc "Destination"
"Port"
Assumes nc -l -p "Port" >"Image File
Name" is
ncryption might
> > > slow down the transfer as well, so the transfer speed might depend on
> > > the speed of your CPUs.
> >
> > additional comment - iirc, it's possible to choose weak encryption for
> > ssh that might actually speed it up a bit.
>
> to
o 119, but netcat exhibits
the same behavior as my broken java program.
why does netcat localhost 119 give me the 500 error when trying to
issue commands to inn2 and telnet doesn't?
this is an up-to-date debian unstable box on an i386.
thanks.
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Has anyone use nc (netcat) to check connectivity using nc's -g option to
specify loose source routed path???
I think I need the kernel not to drop ip packets with source route options
(which is the default I think), but if that's true, how do I disable this
kernel feature???
I ment, of course, nc
On 15-Oct-97 George Bonser wrote:
>If I wanted to use tcp wrappers to do something like:
>
>in.smtpd: .cyberpromo.com: twist netcat %a 25
>
>would it represent a great security hazard?
>
>
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If I wanted to use tcp wrappers to do something like:
in.smtpd: .cyberpromo.com:twist netcat %a 25
would it represent a great security hazard?
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> Could someone help me with netcat. I use the debian package installation
> method. Grab the package off the debian ftp site. It verified that it was
> installed. I try running it by typing netcat and file was not found. I did
> man -k netcat and no man pages were located. I can'
the binary is /usr/bin/nc
On Thu, 9 Oct 1997, Chi Wong wrote:
> From: Chi Wong <[EMAIL PROTECTED]>
> To: debian-user@lists.debian.org
> Date: Thu, 09 Oct 1997 13:13:05 -0400
> Subject: netcat
>
> Could someone help me with netcat. I use the debian package installation
&g
Chi Wong wrote:
>
> Could someone help me with netcat. I use the debian package installation
> method. Grab the package off the debian ftp site. It verified that it was
> installed. I try running it by typing netcat and file was not found. I did
> man -k netcat and no man pages
Could someone help me with netcat. I use the debian package installation
method. Grab the package off the debian ftp site. It verified that it was
installed. I try running it by typing netcat and file was not found. I did
man -k netcat and no man pages were located. I can't find the binary to
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