Greetings Juan,
The Windows XP firewall blocks incoming connections only -- Messenger (for its most basic
functionality) uses outgoing connections exclusively.
Messenger uses both ports 1863 and 80, so unless you want to remove access to the web also,
you can't use port blocking to block Messenger. Instead, depending on what kind of software
you have in place on your network, you can simply block outgoing access to *.msgr.hotmail.com
addresses.
Also, you could use Windows XP's Group Policies to stop Messenger from being run (this won't
stop third-party clients like Trillian however):
http://www.google.com/search?q=windows+xp+group+policy+restrict+applications
____________________________________________
Jonathan Kay
Microsoft MVP - Windows Messenger/MSN Messenger
Associate Expert
http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources -
http://messenger.jonathankay.com
All posts unless otherwise specified are (c) 2004 Jonathan Kay.
You *must* contact me for redistribution rights.
