Getting online through a stealth Server
If you decide to go online with your modded Xbox 360 you will, unless you want to get banned, have to consider using a stealth server. Without using a stealth server Microsoft can detect your RGH/Jtag and instantly ban it from playing any games and stopping you using your Xbox for life in Xbox live.
A stealth server masks your Xbox to appear as a normal un-modded Xbox. The servers listed below are renowned for being the best available.
You can get a free seven day trial with this stealth server
If you manage to get on with Ninja it is a good Stealth Server but to keep it secure they make you jump through plenty of hoops to access it!