Re: Trying to Figure out What's OK and What to Block  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.   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.  And these rules are?  One thing I am
not sure of is something identified only as "SYSTEM"  The local
system process, I guess.  which looks like it wants to send and
recieve UDP traffic to the router  Might be DNS.  and send and
recieve to and from the other computer.  Might be file and
printer sharing.  Could blocking this be causing me to lose the
internet connection?  If it is blocking DNS.  I do not use the
router as a way to network the two computers.  But your
computers are not plugged into a router, they are plugged into a
switch. Whether you inten