Hey. I went to the plugin list some months ago and couldn't find Dynmap on the list.
The plugin can be downloaded here: https://dev.bukkit.org/projects/dynmap
Dynmap is a Bukkit/Spigot plugin that allows your Java Edition worlds to be able to be viewed from within a browser, almost like Google Maps but for Minecraft.
From what I have heard, region-based permission systems such as RedProtect are compatible with Dynmap and can even block/allow it, though I've never used it before so I can't confirm that.
Dynmap is used by tons of people on survival worlds and adding it to Aternos would be excellent! 
