Over the past couple weeks I've been trying to play Halo 3 on 4 player Xbox LIVE co-op while trying to go for the Vidmaster Annual achievment.
Every time we've tried for it thought I have either been dropped from the game after 10-20 minutes or my xbox will disconnect from LIVE completely.
I can and have been playing multiplayer on any of the halo games + multiple other games completely fine for almost 2 years now.
I've also been able to do 4 player co-op and firefight in Halo 3: ODST fine without being dropped from the game or disconnected from LIVE.
It is only in Halo 3 when my xbox will drop me from the game or LIVE.
To connect to the internet my computer connects to our wireless network then I've got the 360s ethernet cable going from my computer to my 360 and a network bridge set up on my computer.
I've tried restarting my xbox, my computer, I even tried using my laptop to provide the internet connection to my 360 but the problem still happens.
When it disconnects me from LIVE I'm able to just open up the guide and press connect to LIVE and it connects fine without giving me any problems, but if I try to play co-op again it disconnects me after 10-20 minutes again.
The people I was trying with were all from Australia as well so I don't think it was dropping me due to trying to connect to people from overseas.
Which I'm able to play the multiplayer on Halo 3 with people from overseas fine with anyway.
What Country/State/Province do you live in?
Modem brand & model number:
2wire 2071-a Gateway
Router brand & model number:
Apple Time Machine
Network Connection Type: Wireless/Wired
Wireless to computer, then cable from computer to 360 using network bridge connection sharing
If Wireless, what type of encryption are you using?
Wireless is using WPA2
If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter?
Computer is using a D-Link DWA-556 Xtreme N PCIe Desktop Adapter
Things you have tried: Is UPnP Enabled? Yes/no/Unknown
Is NAT Type Open?
Any Error Codes you encounter:
I don't encounter any error codes, it just drops from the game and sometimes disconnects from
What type of internet do you have? Cable/DSL/T1/3G?
ADSL2 - Incoming: 21014 kbps, Outgoing: 1023 kbps
Who is your ISP(Internet Service Provider)?
After you run "Test Xbox LIVE connection" and click on "More info", what is the exact message shown on screen?
There is no error message, if I run the Test Xbox LIVE connection test it comes up fine.