1-Open control panel
2-Network connection
3-Press on local are connection
then properties
press advanced
then press Settings
open Firewall then exceptions
then press add ports
Code:Name: Crossfire Port: 13008 Protocol: TCP Name: Xtrap1 Port: 10009 Protocol: TCP Name: Xtrap2 Port: 16666 Protocol: TCP Name: Crossfire Port: 13008 Protocol: UDP Name: Xtrap1 Port: 10009 Protocol: UDP Name: Xtrap2 Port: 16666 Protocol: UDP
And you are done