SSH through HTTP proxy

http://www.zeitoun.net/articles/ssh-through-http-proxy/start
This article explains how to connect to a ssh server located on the internet from a local network protected by a firewall through a HTTPS proxy.

Requirement are :

■Your firewall has to allow HTTPS connections through a proxy
■You need to have root access to the server where ssh is listening
Configure the ssh server
The ssh daemon need to listen on 443 port. To accomplish this, just edit this file (on debian system) /etc/ssh/sshd_config and add this line :

Port 443
Then restart the daemon :

sudo /etc/init.d/ssh restartConfigure the client
I suppose you are on a Linux system (debian for example). First you have to compile the connect binary which will help your ssh client to use proxies (HTTPS in our case). Then you have to configure your ssh client to tell him to use HTTPS proxy when he tries to connect to your ssh server.

1.Install the connect software :
■On debian system, just install the connect-proxy package :
sudo apt-get install connect-proxy
■On other Linux systems, you have to compile it :
cd /tmp/
wget http://www.meadowy.org/~gotoh/ssh/connect.c
gcc connect.c -o connect
sudo cp connect /usr/local/bin/ ; chmod +x /usr/local/bin/connect
2.Configure your ssh client. Open or create your ~/.ssh/config file and add these lines :

## Outside of the firewall, with HTTPS proxy
Host my-ssh-server-host.net
ProxyCommand connect -H proxy.free.fr:3128 %h 443
## Inside the firewall (do not use proxy)
Host *
ProxyCommand connect %h %p

3.Then pray and test the connection :
ssh my-ssh-server-host.net
SSH to another server through the tunnel
For example to connect to in ssh github.com :

Host github.com
ProxyCommand=ssh my-ssh-server-host.net "/bin/nc -w1 %h %p"
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notes:
- no need to use port 443 on the remote server. Just replace 443 with 22 in the ssh config file.
- http://www.saulchristie.com/how-to/bypass-firewalls