I have a Win Xp computer that I can't seem to get working right on the internet.
I have a broadband connection and a router. The other computer connected to the same router works fine.
I had the old version of Kerio (2.1.5) on both, I switched to the free Tiny firewall on the problem computer just to see if the firewall was the problem.
When I first start it it works fine. After a while I cannot connect to anything on the internet unless I reboot.
I am trying to set up the rules so that I block everything that doesn't need to connect to the internet.
One thing I am not sure of is something identified only as "SYSTEM" which looks like it wants to send and recieve UDP traffic to the router and send and recieve to and from the other computer.
Could blocking this be causing me to lose the internet connection?
I do not use the router as a way to network the two computers. I only use it to allow each computer onto the internet. So there is no logical reason for the computers to be talking to each other. Usually it says something to the effect that one computer wants to send a UDP datagram to the other computer on port 137. Should I allow this?