Recently I have been hosting a private server and having a conversation with spazzyman about this renaming stuff because almost everybody is blaming him when suddenly someone started joining and leaving my server. I couldn't see his name (actually there was no name) because he was joining and leaving so fast that the name was not displayed at all. He also made my server ping forever. Spazzyman was in the server but after timing out he was unable to rejoin. I had to restart jj2 and the server. Later on he kept joining/leaving so I was able to get his IP. I immediately noticed that there's actually a server running using that IP. So I joined the server, asked what the heck is going on and the server claimed he is the renamer. I got his name and IP if anyone interested: 80.201.180.197 - "Ghostface OT" And no. It was not Spazzyman because he was with me in my private server and later in the renamer's server.

The renamer was probably just faking but if so how did he do the joining/leaving process (believed to be a DOS atttack)?

Spazzyman also gave me the hostname: 197.180-201-80.adsl.skynet.be

EDIT: Later I hosted a private server again and this guy kept joining/leaving again. He may have changed his IP but the hostname is still the same: 168.189-136-217.adsl.skynet.be

Here's a screenshot:
Hope it works