system
8
frauxm,
There is a built in firewall in WinXP (turned on by default in SP2) but it only provides inbound protection.
These are two very good and easy to use Firewalls.
Zonealarm: http://download.zonelabs.com/bin/free/1012_zl/zlsSetup_55_062_004.exe
Sygate: http://www.simtel.com/product.download.mirrors.php?id=53687
Note: Only use one of the firewalls, as using more then one Firewall at the same time can cause serious system instability.
–lee