I'm the network administer at my college's TV station (WCKN). All of our network is regulated by an Ubuntu 10.04 server (NOT a router), and all traffic goes through that computer (I have no idea why my predecessor set it up this way instead of just getting a router). I need remote desktop access to one of the internal computers (running Windows XP) so our shows can be updated during breaks. I had set it up with iptables port forwarding (which I don't understand at all but was able to get through Google), but recently it stopped working for reasons unknown. I can connect via remote desktop just fine from within the station network using the IP address but I cannot connect from outside using the server's IP address with the port, even though this used to be possible (nor can I connect using the computer's fully qualified domain name, phoenix.wckn.com), so I have to believe that the issue is with iptables.
Unfortunately I know nothing of the network configuration and everyone else in the station who isn't an idiot when it comes to technology graduated last year. I don't even know how to figure out why this isn't working. Any ideas?
If anyone has ideas on how to accomplish this without iptables I'd love to hear it. My predecessor installed VNC on that computer but I don't know anything about how to use it.