Monday, February 13, 2012 - 20:05
Some ports have historically been associated with security vulnerabilities, but see little legitimate use on a WAN or the general Internet. They present a risk to your network and little to no legitimate use is prevented by blocking them. If your network is partitioned with one or more firewalls so that different parts support different functions or groups of users, you should consider applying the same restrictions at the firewalls between them.
