accessing Github from behind HTTP proxy

When you need to pull or push from Github (git://) and you're behind corporate HTTP firewall, you might find below instructions helpful:

1. set environmental variables (in .bashrc or .bash_profile)

export GIT_SSH="${HOME}/bin/http-ssh"
export GIT_PROXY_COMMAND="${HOME}/bin/http-cmd"

2. prepare http-ssh and http-cmd in your ${HOME}/bin/ directory (or any other of your choice -> just adjuct the environmental variables accordingly)

#!/bin/sh
# Filename: http-ssh
ssh -o ProxyCommand="${HOME}/bin/http-cmd %h %p" $@

#!/bin/sh
# Filename: http-cmd
/usr/bin/connect -H http://<your_http_proxy>:<port> $@

now you can freely use git command.

sftp from behind firewall via HTTP proxy in Ruby

Same as the previous Post using ruby:

require 'rubygems'
require 'net/ssh'
require 'net/sftp'
require 'net/ssh/proxy/http'

base_dir = "/some_base_directory"

proxy_host = 'IP_or_FQDN_of_your_proxy'
proxy_port = port_of_your_proxy

proxy = Net::SSH::Proxy::HTTP.new(proxy_host,proxy_port)

Net::SSH.start('destination_IP_or_FQDN','username',
                {:proxy         => proxy,
                 :password      => 'password'}) do |ssh|

        ssh.sftp.connect do |sftp|
                # do something
        end
end

ssh sftp from behind firewall via HTTP proxy

If you work in corporate network that is behind firewall.

if you try this:

chris@emeadb:~$ sftp username@xx.xx.xx.xx
Connecting to xx.xx.xx.xx...
ssh: connect to host xx.xx.xx.xx port 22: No route to host
Couldn't read packet: Connection reset by peer

With help comes connect-proxy
Install it with (in debian like systems):

sudo apt-get install connect-proxy

then configure it:

vi ~/.ssh/config

adjust to your needs the content:

Host *
        ProxyCommand connect-proxy -H <IP or FQDN of your proxy>:<port> %h %p

enjoy:

chris@emeadb:~$ sftp username@xx.xx.xx.xx
Connecting to xx.xx.xx.xx...
Secure SFTP Serverusername@xx.xx.xx.xx's password: