First off I know this has been answered before and I promise I have research many hours on solutions and just about tried them all. I have provided everything asked in the connection troubleshooting forum. If you read below I provide insight to what I have tried. I am out of ideas. If somebody could help pinpoint my problem it would be greatly appreciated. Somebody please give this a serious look. I will give a week or two and then I will talk to my ISP about solutions on there end. If you read below I didn't have this problem until recently and I didn't do anything, as far as settings go, that could have cause this to my knowledge.
What Country/State/Province do you live in? -Germany/Rhineland Pfalz
Modem brand & model number: -**** TM602B/DM
Router brand & model number: -Netgear WNR1000v3
If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter? -Internal wireless adapter
Things you have tried: I have tried using UPnP through the router along with NAT filtering checked open. No luck. I also tried connected the Xbox 360 directly to the modem and still won't let me connect to party. I have no problem joining games or joining friends in games. However, it will not let me connect to party chat or private chat. A few months ago this was never an issue. I never had any problems connecting to anybody in party or game. When this originally started happening I bought a new router because my old one was at least 5 years old. With the new router listed above I am having the same issue. I have even tried DMZ and address reservation to the xbox through the router. A couple weeks ago I tried port forwarding to see if that would work and still no luck. I figured I wouldn't try it again. To top it all off I tried resetting my router and xbox network settings to default settings. I should also say before trying all these things the first thing I tried was turning off power to modem, router, and xbox. I then rebooted everything to see if it would work. When I test my connection through xbox it used to say NAT moderate; however, when I changed the NAT filtering on the router I have yet to have any NAT errors. If somebody could please help me out I would really appreciate it. My hours of google searches and forums searches have lead to great solution ideas but still nothing is working. I would not have put this much effort into this if it never worked before. But a few months ago it did work perfectly. I made no changes to any settings prior to this issue. Also, my friends all have the same ISP as myself and they can all connect to each other no problem in party chat. I also cleared the cache on the hard drive of the xbox. I know these solutions are all in a weird order but I was just typing what I remembered trying. I also want to say sometimes I am able to communicate with friends in game chat and other times not. Please help. Thanks
Is UPnP Enabled? -Yes
Do you have a NAT error? If so, what is your NAT? -Not usually, sometimes it says moderate but ever since I changed the NAT filtering on router to open I haven't received NAT error.
Any Error Codes you encounter: none
Who is your ISP(Internet Service Provider)? TKS Tele Kabel-Service Kaiserslautern GmbH & Co. KG
After you run "Test Xbox LIVE connection" press “Y” for "More Info”. In the pop-up that appears, what are the following values, if shown? (If a value below does not appear for you, just leave it blank.)
D: 192.168.1.1, 0.0.0.0