ports have standardized default usages, this means new or poorly configured installs are prone to abuse, so its generally good to limit these ports in some way.

ports have standardized default usages, this means new or poorly configured installs are prone to abuse, so its generally good to limit these ports in some way. https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbe...