My server is hacked :'(

My server hacked by a player called 13e3eeq.When he first registered to my server he done
the command /stop (he had access to all commands).I opened my server again and he after 10
minutes closed it again.I opened my server again and he had done a giant hole in the spawn,
when i login i fell out of the world,i thought it was lag.But it was not.After i deleted login plugin
(xAuth) and i and 1 admin loged in from his account.He had done op himself.We could not killhim
on pvp probably because he had god command.Later he loged in from admins account and
he destroyed everythink! What should i do to avoid this hacker and how can i chance my server ip? If you have visited my server i am Az.

 

Online mode... /thread

 

?

 

Switch your server to online mode and this won't happen.

 

What difference will be if i chance my server to online mode ?

 

Your chancing your server by running it in offline mode, not in online mode. You won't have random users like that with it runing how it was designed and meant to be. Running in offline mode is a way to let people who won't buy the game, join your server. It's against the law to have pirated the software, and you aren't helping matters by giving them a place to play. It also opens your server to hackers like that who will just make up a new name and rejoin later and do it again

Online mode. Buy the Game, support the devs, and it'll help to solve your problems.

 

Thank you i have bought the game i will do this.But can not a hacker have legal minecraft?

 

They can but it is a much much lower chance due to you being more 'secure' on online-mode. Just make sure that you have permissions set up right and make sure you keep ops on a tight leash.

 

Set your server to online mode, and nobody can 'hack' it.