Nether and Ender Portals

You could break the end portal but idk how to not allow access by using commands

There is probably some sort of command or plugin or config that will allow you to disable the end and nether, but I don't know how to is what I said

You could disable it in the server config file, but this isn't visible to users.. so you got to search for a plugin that allows you to enable/disable them in the plugin config. If this plugin is not in the Aternos plugin list you can make a plugin request here in the forum.

Maybe we will support changing these properties some day.