You could configure your router to drop all packets that are sent through the ports that are being flooded. Example: set a new firewall rule to drop all packets going through port 137 (or simply block the port if your hardware allows it). That should stop the packets from reaching their destination but not from being sent from the computer. You could do the same thing with a software firewall on each computer. That should stop all communications from being sent and recieved through the ports. Good luck.
deepblue
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