World of Warcraft

Sounds like you need to do some port forwarding.

World of Warcraft communicates on port 3724 with the TCP protocol. The patching process requires port 3724, 6112, and 6881-6999. Once again to download the patches for World of Warcraft you should forward the following ports.

3724 TCP6112 TCP6881-6999 TCP

If you can not forward ranges of ports and are only planning on having one computer playing WoW, just forward ports 3724 TCP and 6112 TCP. The 6881-6999 port range is mainly used where multiple computers on a network may be trying to play WoW at the same time.

Ventrilo: From their web site: Click on the "Port number" input box and enter the servers port number. The program will automatically display the default port number of 3784 but you can change this to what ever the server needs it to be.

So forward 3784 or the port number you chose.

http://portforward.com/english/routers/port_forwarding/Motorola/SBG900/SBG900index.htm for a walk through on how to do the forwarding.

Hope that helps!