[botman]

Traffic on the outside port of the firewall is beyond anything that you can write an application for.

You can't prevent people from sending data to your network interface. The only thing you can control is what you send back (if anything) in response to packets hitting your server.

If your firewall is sophisticated enough, you can filter packets that get through by IP address, port number, protocol type, etc, but if there are packets that are supposed to get through normally, you probably can't configure the firewall to let some packets through and prevent others of the same type from getting through (unless you have a pretty expensive firewall).

Any of the packets that do get through, the standard Half-Life engine flood filtering will ignore packets that shouldn't be responded to (and you don't need to do anything else besides setting up the cvar flood control settings).

botman