I want to access a git repository from behind a proxy (which requires authentication). How to do so?

I don't know about git but to specify a proxy with authentication you use (protocol://usernameassword@adressort) eg http://admin:root123@192.168.0.5:8080

Sorry, but I want to run git specifically. I have already specified http_proxy variable

I found the instructions on some page.
I've pasted them here for easier access.

Basically the steps are:
1 - sudo apt-get install socket
2 - in your home directory, put a shell script called "proxy-cmd.sh"
containing (replace YOUR_PROXY and YOUR_PROXY_PORT with your own proxy
parameters):
#! /bin/bash
(echo "CONNECT $1:$2 HTTP/1.0"; echo; cat ) | socket YOUR_PROXY
YOUR_PROXY_PORT | (read a; read a; cat )
3 - chmod +x proxy-cmd.sh
4 - export GIT_PROXY_COMMAND=<PATH TO YOUR SCRIPT>/proxy-cmd.sh

Note: you can export GIT_PROXY_COMMAND in your ~/.bashrc file to make
this permanent

Cheers

When I try this, I get the following error:

Connection Refused: Forbidden
git.worldforge.org[0: 85.214.62.124]: errno=Connection refused
fatal: unable to connect a socket (Connection refused)

Please help

@ameyp your suggestion worked like champ! Thanks!

Note to others: ameyp suggestion works only for git_:_// scheme urls.

Any solution for http_:_// scheme as well?

This worked for me !

Set proxy :
Check proxy :
i found it in here.