So I had this curious Guest log on. Told me I was a cool admin and a bunch of kiss ass things. At the time I was building something near spawn and he mentioned that he had built something similar to it on his server and that I should check it out. He gave me an IP and I told him I would check it later. He hung around until I finished working then I went to check his server. When I tried to log into his "server" it tried to log into my server using the IP address he gave me. Since I'm the server admin I noticed the console login messages when I tried to log in. At first I didn't notice, but I thought I would check my server after three failed attempts to log into Guest's server (client message would just say "Disconnected" and server message was "endOfStream"). My question is, what kind of attack is this? My server is on on-line mode so that probably prevented the attack from working. So why try to make me log into his own "server"? What would it have accomplished? I don't see how he would gain OP or anything that would benefit him since it was me logging into my own server just through a different IP.