CL stands for: "Challenge Lobby" Its hacked lobbies on MW2 and CoD4, where they have huge mod menus. (Like oX-matto-Xo's patch) You need a JTAGGED XBox to do this. I suggest you look in the Xbox section for a tutorial on how to do this.
Bypassing is when you are able to delete the patch, and are able to play online.
There are several problems with this method. The first and major one is, you cannot play with other players who aren't bypassing with the same method. Thats what all the small little codes the members post in this section are for.

k i didn't know CL was challenge lobby thx

for bypass: can you do any modds online in pubs like, infections from a jtag, or can you do more or less?

k i didn't know CL was challenge lobby thx

for bypass: can you do any modds online in pubs like, infections from a jtag, or can you do more or less?

Well theres actually more mods f you bypass :L and the menus look better but barely anyone bypasses anymore

you can edit your stats and all :p

can you noclip online or in private match???

can you noclip online or in private match???

I think it needs to be bypass.

but can you only play with people who bypass? or with anyone?
and
does it work for xbox?

i still bypass all the time if anybody wants to add me