Hi, My isp have sugested i close up port 111 as it can be abused. They state i am open to this kind of attack https://www.shadowserver.org/wiki/pmwiki.php/Services/Open-Portmapper should i and what is the best method? iptables or ispconfig firewall Running debian jessie - ispconfig 3.1.1.p1
Simple. For anyone else, login in to ispconfig, go to system-firewall and add default rule. This adds ports 20,21,22,25,53,80,110,143,443,587,993,995,3306,8080,8081,10000 Therefore blocking 110 and any other ports
