I know this is a lengthy post, but PLEASE..any online xbox gamers please take the time to read it and help a brotha out!!

Alright, I have everything you need to correctly get online with the xbox. My problem is that i'm behind some freakin firewall or something that i don't know about that's on my computer. The only one I knew of was Zone Alarm, and I uninstalled that sh*t.

I have a list of questions, so if you could help on any of them, please do!

First. When trying to play on Gamespy, it gives me this message: "Gamespy has detected that your computer's internal IP addres (xxx.xxx.xxx.xxx) is different than it's external IP address (xxx.xxx.xxx.xxx) (that IP address is different than the first one it shows me). This may be caused by firewalls, a NAT proxies, or other unusual network configurations and may prevent you from hosting a game."

Does anyone else get this problem and know how to solve it?

Can you manually open the port numbers on Zone Alarm?

********MOST IMPORTANT*********
Is there a way I can search my computer for firewalls that I may not know about? (my father may have some on here I don't know about) Because obviously I have something on here holdling me back. I uninstalled Zone Alarm, but something else is still on here.

What is NAT? (what does it stand for?)

If all else fails, should I try downloading a firewall which I can manually open the ports? If so, please name some of the firewalls that can let you manually open the ports needed to play games online.

This is truly frusterating the hell out of me. If anyone else out there had the same problem, then you know how I feel. So anyone who can give me ANY assistance, please do so!! I have everything needed to play online (I can get to the "Searching for games" screen). Just some damn protection crap on my computer is holding me back!!!!!

Thank anyone who helps me!!!!!!!!!