How to set up a network for network rendering

Hello
I’ve tried many, many times to get two windows 7 computers to network render. The problem I have is not anything to do with the blender network render itself, but the computer network, because I just cannot get them to a state where I can network render!
I followed the instructions on cgcookie “setting up a renderfarm”, but it didn’t seem to work either!
Are there any detailed tutorials on how to link your computers for network rendering?
Please help!

My goodness, that was easier than I thought!
After turning off windows firewall it worked perfectly!