14Eyl
Should I block traffic on UDP 5353, 5355, and 137,138,139?
I've just set up a new Debian-based VPS instance and put my usual iptables rules in place where I block off almost all ports and open the ones I need, and I've noticed that on this network I'm getting peppered by lots of extra UDP requests for some reason, particularly on ports 5353 and 5355. This article says that they're "legacy protocols" but apparently they're still in common use. Is it worth my opening these ports or should I leave them closed (causing my system journal to be spammed every few seconds with one of these blocked requests)? Am I missing out on anything by leaving them blocked?
