I have a request to block any incoming connections from a block of IP addresses but they would like to leave the outgoing traffic alone (no block). Is there a way to do this in Windows XP? The Windows Firewall does not seem to be able to do this as far as I can tell, and I tried setting a local ip security policy (secpol.exe) to block this IP range but it blocks in both directions. This would be internal to the local network and the outgoing packets will be UDP so I do not need to worry about packet acknoledgement. Does anyone have any suggestions?