Fierwall issues?

I have a Win2K network with a proxy server running Winroute Pro as a fire wall. It is using NAT.

For some reason I can reach the internet from any computer on the network. But I can only reach Citrix, ftp, smtp, pop3, etc. servers from my Primary domain controller (which is different from my proxy server). I can “Ping” from the domain controller as well, but no other pc on the network.

How do I configure my firewall to allow all computers on the network to get connections out via these other protocols? (I’m assuming this is a firewall issue.)

Thanks,

Preston