I apologize in advance as this may be a noobish feeling post. I recently set up a private whitelisted server for a group of friends. Happily running Spigot 1.11.2. It's been many years since my last real solid multiplayer minecraft run and one of the servers I was on was one of the very very early bukkit releases and we had some useful plugins set up. One in particular I have been on the lookout for but nothing stands out in my searches. Essentially the concept was simple. Build a normal nether portal. Attach a sign and a button. I forgot the mechanics to set it up but pressing the button would cycle destinations to other portals in the world which would display on the sign. If memory serves it was mostly done in game with no commands and just signs but I may be wrong. I'd like to have that for our current world but haven't been able to find a plugin with those specific mechanics.