Protect Open Web proxy Mikrotik - Mikrotik Script RouterOS

Prevent the Open proxy from being misused by outsiders.

/ip firewall filter
add action=drop chain=input dst-port=3128,8080  in-interface-list=WAN protocol=tcp
add action=drop chain=input dst-rt=3128,8080 in-interface-list=WAN protocol=udp
Credit: www.o-om.com