Vpn seems to be working fine

Right now my brother has a remote connection to me from work, I have a remote connection from work. I am linked with a friend from highschool and am also linked to my brothers house. Seems to be working great. We can route traffic back and forth between my network and my brothers or my friends. The only thing I see is we cannot route traffice from my brothers to my friends. I have to work on that portion. Now that is working, I am going to build up a new firewall machine, it is a bit faster and has a bit more memory.