Snort mailing list archives
RE: DOS rules for Nimda
From: "Richard Ellerbrock" <richarde () eskom co za>
Date: Thu, 26 Sep 2002 18:07:53 +0200
Getting back to the cisco rule option - not really going to work as it will be difficult deploying to over 700 routers/sites. All these sites are on one large Intranet connected via a single Internet connection and at the Internet connection infront of the firewall is where I have deployed a sensor. What I have done in the meantime is to scan for TCP SYN's on port 80 hitting the firewall with destination addresses that are in the internal 10.0.0.0/8 address space (not all space is used, so some unknown destinations hit the firewall due to the default route). This solution is not portable and 100% reliable - also requires my own rules. See my other note to Martin for the real requirement/solution!
"Madziarczyk, Jonathan" <than () cityofevanston org> 2002/09/26
05:22:53 >>>
Even Better (assuming that you have Cisco): http://www.cisco.com/warp/public/63/nimda.shtml
If you use this, please make sure you have IOS ver 12.2(10a) or higher. There's a bug where it doesn't catch all packets if you have a "log" statement in an ACL that is applied to the same interface. Otherwise it works great! My .02 ~than ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- DOS rules for Nimda Richard Ellerbrock (Sep 26)
- Re: DOS rules for Nimda Chris Green (Sep 26)
- Re: DOS rules for Nimda Martin Roesch (Sep 26)
- <Possible follow-ups>
- RE: DOS rules for Nimda McCammon, Keith (Sep 26)
- RE: DOS rules for Nimda Tudor Panaitescu (Sep 26)
- RE: DOS rules for Nimda Richard Ellerbrock (Sep 26)
- Re: DOS rules for Nimda Richard Ellerbrock (Sep 26)
- RE: DOS rules for Nimda Madziarczyk, Jonathan (Sep 26)
- RE: DOS rules for Nimda Richard Ellerbrock (Sep 26)