This mod is part of The Vanilla Experience.
Zombie Proof Doors is a minimalistic mod which prevents zombies from targeting and breaking down doors. Villagers and players have over time figured out how to keep a single zombie outside, without worrying if the door breaks down.
You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge ecosystem.
Serilum.com contains an overview and more information on all mods available.
Comments are disabled as I'm unable to keep track of all the separate pages on each mod.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!