Opening NAT through 2 routers?

Sorry to hear that WarMast3r3256,

I have one last thing for you to try, I noticed on my own personal router. When I port forward for a open NAT on XBL.

My router says everything is sucessful, but my NAT didn't change. But when I opened the right ports and then I rebooted my router. Then my NAT changed to OPEN. So after you went through and opened the correct ports, did you reboot your router?

Need model of the modem , its not a router too is it ? (gateway maybe) anyway , hard enough getting open nat on one router let alone 2 ...I would start at the 1st box in the loop , the modem , plug the xbox straight in and make sure nat is open . If you
cant get open nat at box 1 no way to get it at box 2....then I would hook up the 1st router and check nat there ....and so on... and you cant do the port forward AND have Upnp enabled as that is conflicting instructions...

Might not be much, but try to make sure both of your have an open NAT if you're going through a router.

Thanks for that.

Just changed routers is all,going through the settings.

NAT was open before so should be ok,will open those ports and test.

Thanks

Forwarding ports on your router--whether via DMZ, UPnP, manual forwards, etc.--simply will not get you open NAT in a double NAT situation. The reason is that the upstream, Internet-facing NAT router run by your school (and, thus, outside your control) is
almost certainly not configured to forward those ports through to your own NAT router. Though an over simplification, think of a NAT router as a wall that allows your Xbox to see (communicate) out through it to the Internet but prevents any devices outside
the wall (i.e. on the Internet) from seeing in through the wall to your Xbox. When you forward ports (again, this includes DMZ etc.) on a NAT router, you are essentially punching holes through the wall so that your Xbox can be seen from the outside (placing
the Xbox in the DMZ essentially removes the wall as to it), which is what is needed for open NAT.

Your problem is that your Xbox has TWO such walls between it and the Internet--the inner wall (closest to your Xbox) is your own Netgear NAT router and the outer wall is the school's NAT router. No matter how many holes you punch through your inner wall
(or even if you tear it down using DMZ), outside devices (i.e. on the Internet) will not be able to see your Xbox because of the school's outer wall, which only your school's IT folks can punch holes through. Again, this is a gross oversimplification but
hopefully this helps you understand why double NAT makes port forwarding on your own NAT router alone (i.e. not also on the upstream NAT router) ineffective.