Bots atack

[RadioClick]

I have a problem with the bots atack. Until yesterday i had this atack on my network and i don't know how to do. I have also bopm but don't see all this bots and i don't know why ...

How can i do for stopping this atack?

(11:43) -irc.RadioClick.**- *** Notice -- xtrqrOFXZ (GuPuk@131.0.247.38) has changed his/her nickname to aerrtFKbj
(11:43) -irc.RadioClick.**- *** Notice -- xtrqIiGp (SjzUK@221.228.210.199) has changed his/her nickname to aerrKHjA
(11:43) -irc.RadioClick.**- *** Notice -- xtrqISxf (RVCOM@78.39.252.125) has changed his/her nickname to aerrpojkp
(11:43) -irc.RadioClick.**- *** Notice -- xtrqzeShCm (nRkFf@trade.inter-ural.ru) has changed his/her nickname to aerrSrnQEJ
(11:43) -irc.RadioClick.**- *** Notice -- xtrqWXEDFa (atXfp@177.8.171.67) has changed his/her nickname to aerrMyMH
(11:43) -irc.RadioClick.**- *** Notice -- xtrqYUgGbs (roTHH@211.218.126.189) has changed his/her nickname to aerrWoXV

[Syzop]

I see you figured out already that AntiRandom could be helpful in such a case.