Minecraft server maintenance mode?

I have a question. I own a server and would like to activate maintenance mode there [host is MCHost24]. But how does it work? Can help me so. Do you need a plugin and if so could you tell me which one?

In what maintenance mode? Whitelist on it, done. Since you have your rest while waiting. Then change the motd and then the hare hops.

Well, there's an x / x in the number of players

Gives a plugin for, otherwise give ops the join perms u. Set slots to 0.

Have a look for a plugin to just enter Google "Maintenance mode plugin Minecraft" you should find it

Thank you.