I'll just go ahead and tell you guys :>

First, you have to have Ethernet, you have to be in-game. For Soldier Front, you have to have the " Soldier Front : T1. 87 " orange . It is at the upper left of you screen. Next, you unplug your Ethernet and start killing! Finally, you plug your Ethernet back in.

Note that if you do it slowly, more than 5-10 seconds, you'll get disconnect. That's the risk. And also, you can get banned for doing this--- I hope not ...