Hackers

The other day i was attacked by a group of hackers, after i got off the server, someone logged in with my name and oped his friends, then, they banned everyone else and screwed around on the server. Everytime i would ban one of them, another would unban him/her, but what i did was stop the server, started it up on a different world, then when thay all got oni opened the ops notepad file and wiped their names from it then reloaded the server. that deoped them all then i just banned them one at a time. To prevent this from ever happening agian, a installed a plugin called iplock, it lets me lock my ip so anyone who wants to log in with my name can only do it from my pc, so sucks for you hackers!