Major lag on one server

Ok, so I joined the Taco’n’Banana Terminator role play server today, and noticed i had 15 fps and 1000 ping
I thought it may have been gmod, so i restarted steam and joined again, same happened.
I joined the jokerice stranded server and i had 40fps and 200ping, normal.
So it must be the server, but everybody else on there seemed to have no problem
Any idea what i should do?
Oh, and their forums are down.

They’re probably getting DDoS’d.