Plesk Onyx - Version 17.5.3 Update #38
Ubuntu 16.04.3 LTS
usually I change on the Plesk firewall the "System policy for outgoing traffic - Allow all other outgoing traffic" from allow -> deny and allow only defined outgoing ports.
But on a new Ubuntu System as soon as I change the outgoing policy from "allow -> deny" and activate then the firewall in plesk, Services like ping, ftp from external stops and also access to websites (http & https) from external via ipv6. Ping, ftp and website...
Plesk Firewall ip6tables
Ubuntu 16.04.3 LTS
usually I change on the Plesk firewall the "System policy for outgoing traffic - Allow all other outgoing traffic" from allow -> deny and allow only defined outgoing ports.
But on a new Ubuntu System as soon as I change the outgoing policy from "allow -> deny" and activate then the firewall in plesk, Services like ping, ftp from external stops and also access to websites (http & https) from external via ipv6. Ping, ftp and website...
Plesk Firewall ip6tables