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Old 02-17-2007, 07:45 PM   #1
tom-ubuntu
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Trouble setting up SSH tunnel


I have a desktop and a laptop, both running Ubuntu Edgy. I have sshd configured on the desktop using a custom port number and authentication key. Using ssh (with and without X) and sshfs, I can connect from the laptop to the desktop without any problems.

When traveling, however, I often have no choice but to use an unsecured wireless access point. For this, I would like to set up an SSH tunnel and SOCKS proxy forwarding. Following the instructions there, I try typing:

Code:
ssh -D 9999 -p 2222 -i ~/.ssh/id_rsa my.homeip.address
When I enter the passphrase, it does give me an ordinary ssh connection, but with the following error:

Code:
bind: Cannot assign requested address
channel_setup_fwd_listener: cannot listen to port: 9999
Could not request local forwarding.
I've tried lots of ports, but always get the same error. I don't believe it's a firewall (firestarter) or router problem. I get a similar error when using the -L option with ssh.

I should probably mention that I've installed apache and squid in the past, but removed squid. Apache is still installed, but not active.

Can anyone point me toward a solution? I'm about ready to give up, but surely there is something simple that I'm overlooking. Thanks for any help any of you can provide.
 
Old 02-17-2007, 08:11 PM   #2
Brian1
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Registered: Jan 2003
Location: Seymour, Indiana
Distribution: Distribution: RHEL 5 with Pieces of this and that. Kernel 2.6.23.1, KDE 3.5.8 and KDE 4.0 beta, Plu
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Squid is a proxy server. Are you using some other proxy server app on the machine you are ssh too?

Check these links.
http://www.linux-noob.com/forums/lof...php/t1151.html
http://www.linuxlogin.com/linux/admin/sshtunnels.php
http://www.suso.org/docs/shell/ssh.sdf

This should help with your other question mentioned.
http://www.linuxquestions.org/questi...d.php?t=530015

Brian

Last edited by Brian1; 02-17-2007 at 08:16 PM.
 
Old 02-17-2007, 10:08 PM   #3
tom-ubuntu
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Quote:
Originally Posted by Brian1
Squid is a proxy server. Are you using some other proxy server app on the machine you are ssh too?
I thought OpenSSH 4.2+ provided its own ad hoc proxy server, when used with the -D option. Would I need to set up Squid or some other proxy server on the host machine in addition to sshd?

I'm wondering if the problem could be in my sshd_config file. AllowTcpForwarding is set to yes, as is GatewayPorts and TCPKeepAlive. What about ListenAddress? Does that require special configuration? I don't understand the bind error that I keep getting.
 
Old 02-24-2007, 09:14 PM   #4
Brian1
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Registered: Jan 2003
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From what I have been reading I say you are correct in it has a simply proxy setup. I never tried it so I can't say exactly what to do. I just seen this post today and it may help.
http://www.linuxquestions.org/questi...43#post2644643

Brian
 
  


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