Deuce bigalow

Thank s guys so xp firewall is the problem,best i turn it of when i want to host then,thanks for the info and happy fragging..

Hello fellow gamers,would like to know is their any way to host agame of recon without disabling the xp firewall as when i try to host with firewall up my buddies can,t get in and firewall down they can. Only started playing recon online and need to know the set up as have playing day of defeat along time and fancy a change..any would be great.