Try this first: Completely disable any firewall and set a DMZ for your local IP. If that doesnt work, your router is not forwarding ports correctly, that means header information in the IP packets is not "translated" correctly. There are some router models out there which encounter that problem. IF ...
that sounds if someone is "flooding" your IP with requests, maybe pings. (renewing IP helps, thats an indicator) check your firewall if theres a setting like "dont respond to ping requests" or something like that. furthermore, some hardware router between your cable modem and your network card would...
Thanks to all who put their time into this event, good job!
Why not make the next event a "Virtual Pool Mayhem" ? Like a day of everything - 8, 9, straight, snooker, cowboy, carom, and whatever else.