Making Internet Servers From My Comp.?

I cant get ESF to work with the dedicated server. But the most important thing is that im trying to make an internernet listenserver, ive heard ppl i need to add "sv_lan 0" to one of my config files but im not shure can sum1 plz help? Cause i have no clue

No error = no help

Put sv_lan 0 into your listenserver.cfg. Thats what I would try