Here is the situation: a windows machine has VPN connection to a development service (for instance, HTTP sever), and we’d like to use it from another machine, which doesn’t have VPN credentials ready. So there is a little trick to get things running in a minute just using socat.

# socat tcp-listen:80,fork

Now you just point the third machine to your station and the build is working. Out of options available, this one is particularly convenient: works on Windows, easy and safe.