Flood Bots 1000+

DeMiNe0 · Posted: Jul 07, 2004 3:27pm Post subject: Flood Bots 1000+

My network has been getting killed with Flood bots. I've glined about 3000+ of them allready but they keep coming.

They join until my servers connection cant take it anymore. All they do is log on and join a random channel. They somtimes spam and somtimes they dont. I think they are all controled from some central control.

They also dont reply to ctcp version or fingers.

Can anyone help me? This is destorying my network.

codemastr · Idler Joined: 05 Feb 2004 Posts: 353

I really don't know what you are expecting here. We spent over an hour on IRC trying to help you with this earlier today. No, there is no "click here to stop a botnet attack" feature. You have to kill the bots. If you can't find some characteristic that allows you to ban them all (e.g. nick is 8 chars long, ends in a B and the realname is the same as the nick), then you'll need to kill them manually. There is no simple cure to this. Other than that, I have no clue what you are expecting someone to do for you.

DeMiNe0 · Posted: Jul 07, 2004 9:07pm Post subject:

I've heard of services that detect floods of users joining. Maybe one of thoughs can help.

Who ever is doing the DOS has thousands of bots. So far i've glined nearly 4k of them. I cant keep glining every flood i see.......

codemastr · Idler Joined: 05 Feb 2004 Posts: 353

Well, what do you think a bot like you described would do? It would ban them as well. Those kind of floods are really impossible to detect. If 5000 connections occur, 4990 are bots, 10 are users, there is no way for it to tell which 10 are users. It will ban all 5000 of them. So such a bot would be no better than just setting up a script to gline someone whenever they connect until the flood stops.

Ib3N · Lurker Joined: 10 Mar 2004 Posts: 157 Location: ChatSpike

Ib3N · Lurker Joined: 10 Mar 2004 Posts: 157 Location: ChatSpike

we've had our fair share of drones, and defender has killed them all. Ive seen only like 2 or 3 slipped by that I had to kill manually.

You can also define regexp kills for it

Ib3N · Lurker Joined: 10 Mar 2004 Posts: 157 Location: ChatSpike

ps. Your net allow warez, and already have a few warez channels... You might want to concider the fact that drones/DDoS and warez walk hand in hand on ircnets

DeMiNe0 · Posted: Jul 08, 2004 3:54am Post subject:

ya the warez channels arnt registered. For some reasen i guess the forbid expired.

also when i run irc defender i get:

[digtox@server1 defender]$ perl defender.pl
IRC Defender - Programmed by C.J.Edwards (Brain) - irc.chatspike.net

Loading configuration file...
.pm in @INC (@INC contains: /usr/local/lib/perl5/5.8.2/i386-freebsd /usr/local/lib/perl5/5.8.2 /usr/local/lib/perl5/site_perl/5.8.2/i386-freebsd /usr/local/lib/perl5/site_perl/5.8.2 /usr/local/lib/perl5/site_perl/5.6.1 /usr/local/lib/perl5/site_perl/5.005 /usr/local/lib/perl5/site_perl .) at ./Modules/Main.pm line 193.
[digtox@server1 defender]$

I have the latest perl up. And i allready posted on the IRCdefender forums.

snoice · none Joined: 03 Jul 2004 Posts: 19

I might be a little late and well never read all the replys but a quick note i run Anope services, and there's a chankill option, ive had 1000+ bots attack my network, in the run of 2 das kept joining the same channel all i had to do was /os chankill #channel Reason And bamn all users/bots in that channel except IRCops got akilled/Glined. That worked great and atm no bots are around or have been for a while Smile

.

Travers · none Joined: 19 Feb 2005 Posts: 7

You say they all join a channel. On my network on the oper service i coded we have a GOJ command (gline on join) so we could for example add #Help to the GOJ list and anyone who joins #help would be glined with 'reason'. This is a good way of banning them it will ban their *@address noexpire.

Travers

ArqNet IRC Network - irc.arqnet.org
Network Officer
PublicRelations Consultant
sebastian@arqnet.org

braindigitalis · Idler Joined: 22 Sep 2003 Posts: 443 Location: IRC

Ashen · Idler Joined: 05 Jan 2004 Posts: 285

In this sort of situation I would suggest reversing the 'public access' policy of your server.

Mlock all channels +RM, require email authentication for nickserv registration.

Stop non-opers creating new channels, or setup services to auto-akill clients who join the bad channels.

Do CTCP version checks, and akill people with bad/no version.........etc

Generally, when in a bad situation, you have to stop being nice :-(

-Ashen

Robert-E-Lee · Posted: Mar 07, 2005 1:03am Post subject:

re: config editing wiyh notepad?
use wordpad instead..it actually saves shit in generic unix txt format...
k, thx.
bai

pepolez · Lurker Joined: 05 Oct 2004 Posts: 163 Location: IRC

yep, that killchan module is great for dealing with floodbots..just look for a common chan they join and type killchan add #<channel> <reason> in the control chan Smile

also, its great for stopping bottlers and xdcc bots with abnormal version replies Smile

great work creating that braindigitalis Cool

morax · none Joined: 25 Jan 2005 Posts: 18

restrict your class and auth blocks.

if your average userload is 70 over 3 servers, make each server hold about 35 clients as max until you need to add some more. that way, not many of the bots can connect to the network, and you can defcon without having to hunt out a few hundred bots.