Well i recently modded my xbox with an unleashX dash. Linksboks connects fine and I can FTP perfectly with FlashFXP. When I try to connect to live it says I dont have a connection and when I try to download maps from Mimesis it says can't connect DNS problem or something.

BTW i'm using a Linksys router with 2 comps and an Xbox. My 360 connects to Live perfectly with open NAT.

P.S i'm using a normal ethernet cable not crossover, the one that comes with the 360.