Plugin: IPList
Link: https://dev.bukkit.org/bukkit-…iplist-v0-1-cb-1-4-7r0-1/
Description: Whitelist IPs instead of usernames. I want to make a cracked server for my friends only, but a username whitelist obviously won't work for that, so I'd like to have this plugin added 
It is old, but I tested it myself and it works fully in 1.11.
