It's also interesting they all use 12345 as the number.
PLEASE give us real information. It is EXTREMELY difficult to formulate a spamfilter out of modified stuff. If you feel you need to hide IP addresses to protect anyone then I have no problem with leaving you with your problem.
Sorry for the misunderstanding guys... before I actually provided examples.. and the patterns.. please see below connections.. i want to block via spamfilter.
WinXP15293 was jmXsuze@119.46.68.228 * winxp
WinXP56162 was ndhxjf@200.75.51.151 * winxp
DT`S-SQpr98536 was DTS-SQpr@79.140.17.11 * dt`s-sqpr
DT`S-SQpr6589 was DTS-SQpr@114.213.254.253 * dt`s-sqpr
mac46648 was wsedf@146.219.19.160 * mac
WinXP10865 was nhjujhf@203.147.18.212 * winxp
WinXP35417 was hbgbvf@204.74.248.249 * winxp
Xp`Windows-pms10219 was ~XpWindows@200.75.51.151 * xp`windows-pms
Yes we do have bopm but thing is we configured auto join to channel. So it joined the room first then gets banned and more over sometimes bopm can't help. As they always follow these pattern. and If we can block it though a simple code why not go for it.