I have the OSX VNC set up on the Mac, and its using port 5900. In our firewall I have the NAT mapping an external IP address to the internal IP address of the mac. I also have set up the service for the Macs internal IP Address to use the OSX VNC. The service is set to use UDP. I've actually tried TCP as well, but I can't get either of them to work. As soon as I activate the NAT for the Mac, it loses internet connection. I have many PC's setup the same and have no problem with them.
On the mac side, I have hardcoded the IP address in as well as hard coded the DNS address (I have already tried DHCP ). Still nothing. Any ideas from anyone?