Ahh, now I get where you are coming from! PCUNITE added in the last post a “FIREWALL CUSTOMIZATIONS:”
Which IMHO he should have avoided or simply pointed to the link provided OR do it properly.
LIke anything else firewall rules without context to the rest of the config is not all that useful, or at least make clear the approach being used (either a. accept all blindly and try to block bad stuff default mode [ basically useless after changing default settings ], or b. accept known traffic needs, block everything else.)