Using SSH over a Proxy

Written by BinnyVA on April 9, 2007 – 1:42 am -

Back in the days when I was working in a web development company, I had to ssh into some sites for setting up crons, importing database dumps etc. But there was a problem – my system was behind a proxy. And SSH did not have an option to connect through a proxy.

To use ssh over a proxy connection, you need a software called Cocrkscrew. Download the source and compile/install it.

Installation

wget http://www.agroman.net/corkscrew/corkscrew-2.0.tar.gz
tar -xzf corkscrew-2.0.tar.gz
cd corkscrew-2.0
./configure
make
su
[Enter Password]
make install

Configuration

Open the file ~/.ssh/config

Add this line..

ProxyCommand /usr/local/bin/corkscrew <proxy_server_ip> <proxy_server_port> %h %p

Example…

ProxyCommand /usr/local/bin/corkscrew 192.168.1.15 80 %h %p

Here 192.168.1.15 is the proxy server and 80 is the port.

After this is done, just connect to the remote server using ssh.

ssh google.com

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Posted in Networking, Tools | 8 Comments »

8 Comments to “Using SSH over a Proxy”

rohitj’s Blog » SSH over Proxy Says:
January 7th, 2008 at 9:11 am
[...] was a post on LinDesk about how to use SSH over proxy. Thats surely a big issue for people living in developing country. They have to work behind proxy. [...]
Clemens Says:
September 3rd, 2008 at 12:35 pm
Thank you, works perfect.

Note: If the proxy requires authentication, you have to create a file with the content
:

Make this file readable only by yourself by
chmod a-r
chmod u+r

and then alter the line in ~/.ssh/config to
ProxyCommand /usr/local/bin/corkscrew 192.168.1.15 80 %h %p

(From the corkscrew man page)
Shailendra Says:
September 11th, 2008 at 5:24 pm
Great!!!

Worked perfect.
Jeremy Says:
November 27th, 2008 at 9:54 am
Thanks, worked perfectly!
Thomas Says:
March 5th, 2009 at 1:02 am
I can’t get it to work. I’m a nub when it comes to using CMD. I can’t get the kode to work. please help me:D
Chris Says:
May 19th, 2009 at 7:57 pm
Can you say… awesome!
Josu Says:
August 3rd, 2009 at 10:52 pm
Hello, thanks for this article.

But I have problems connecting to diferent port:

$ ssh -p 8080 myserver
Proxy could not open connnection to 85.50.69.178: Forbidden
ssh_exchange_identification: Connection closed by remote host

I have a proxy and a firewall. I configured my server SSh service on 8080.

If I write on a firefox “myserver” i have:

SSH-2.0-OpenSSH_5.1p1 Debian-5

Thanks for all.
ron Says:
October 18th, 2009 at 12:41 am
when it comes to using CMD.

Your need an ssh client for windows first.

LinDesk