possible modem problems

[Buckeye298]

Well, I just got xbox live and was really excited to get to play with friends online. It turns out that i have strict nat (just my luck) I currently have a Toshiba PCX 5000 its is a cable modem and i plug my ethernet cable directly into it. I share this modem with my computer aswell. I think it is a modem and router combo. if anybody is sure that it is, that would be a big help. and is it possible that my modem is just not compatible with xbox live? Also i have had problems with my internet connection in general in the past could that be the problem? Does anyonebody have any idea of what i can do its driving me insane.

Any help will be greatly appreciated

[TTR Dr Payne]

You can check out this list for Compatible and Imcompatible routers. I did a quick check on the list and didnt see what you mentioned listed anywhere.

Try logging onto it on the internet and see if theres a setting for NAT, there usually is. You might be able to just change it right there.
The usual address to type in is 168.192.0.1 type that right into the URL bar, and if thats the correct number you will be able to log right onto your router. Its not always the number though, so it might not work. It should say somewhere in the instruction manual what the number is to log onto.

Hope that helps.