Console command for Counter strike source help

[Spiders]

does anyone know the console command to open a server you created from ingame counter strike to allow people to join your game over the internet?

I dont know what it is but i know it has to be opened or your game wont show up on the list, or you cant connect to it or something

 

[dustin_ds3000]

sv_lan 0

Steam Server requires you to forward the 4380,27000-27050 ports if you are connected through the router