This repository contains a very simple binary that creates a SOCKS proxy. During my time as a security consultant, I often wanted to access a remote host that was only accessible from a client's computer, but the various tools I use were on my personal laptop. This program contains a simple SOCKS proxy that can operate in two modes:
In this mode, you run the program as normal (e.g. ./socks -a 192.168.0.1 -p 8000), and it opens and creates a SOCKS proxy for you. Nothing particularly
fancy :-)
Occasionally, you may not be able to open a listening port on the machine you wish to run the proxy on (e.g. due to endpoint firewalls, no admin access, etc.). You can bypass this by (ab)using SSH port forwarding. In this mode, you run the proxy like so:
./socks ssh -a localhost -p 8000 -u andrew my-laptop:22
In this case, the program opens an SSH connection to the host my-laptop on
port 22, logs in with user andrew and prompts for a password, and then opens
a listening port on my-laptop with address localhost:8000. As such, on
my-laptop, you can use the address localhost:8000 as a SOCKS proxy, and it
will properly forward traffic back over the SSH connection and out of the SOCKS
proxy as normal.
GO15VENDOREXPERIMENT=1 go build -v .
I have successfully used this program on all of Linux, OS X, and Windows.