Block P2P, FTP, and else on Asus router

up vote -2 down vote favorite I have a ASUS router RT-AC66U which has a firewall section but I am a bit confused which ports I need to block for P2P and FTP and eventually other services which will drain the coection.

The firewall does have "Filtered ICMP packet types" in case that is a simpler way to setup my firewall.