So yeah, recently I was playing on a server and some guy said if I don't give him OP (I'm just a mod so I can't give him OP) he will hack into my system and DDoS me, stuff like that. The next day, I could not join any 1.7.9 servers. I could only join a 1.6.4 server which was modded.
I wouldn't worry about that guy who threatened to hack you. It was probably just a whiny little 3rd grader who's spoilt and gets upset if he/she doesn't get his way. I know of one solution though. Are you trying to connect to the server with 1.8? If you are, it's an easy fix. Just downgrade to whatever version the server is on, such as 1.7.10. If not, maybe mention something on the website hosted by your server about the loss of connection to it (If it has one :p).
Pls halp me D: