Snort mailing list archives
RE: Speedera Alerts
From: Erek Adams <erek () theadamsfamily net>
Date: Tue, 26 Mar 2002 09:16:16 -0800 (PST)
On Tue, 26 Mar 2002, Luo, Feng (Exchange) wrote:
Erek, could you explain what the dangers about these Speedera Alerts are, I got a lot too.
Feng, It's not so much the "danger" of the alert itself. Rather, what else it _could_ be is more of the danger. Consider the following: * Your users are on the internet. * Your users visit a site using Speedera. * You see the resulting 'pings' back. Now, if this goes on for a while, you'll consider it 'normal' and not unusual for your networks traffic. Heck, you might even put up ignore rules and/or remove that rule from the list. Now by doing so, you've given the 3l33t h4x0r a alert type that can be mimiced and would be ignored. Now they could use the Speedera Ping type as a ICMP tunnel. You'll need to inspect the packet dumps and make sure that it is a 'Speedera Ping' and not something else, IF you are concerned about it. Since the ICMP rules are prone to lots of false postives and large numbers of alerts on legitimate traffic, they are turned off by default. I would _strongly_ suggest: http://www.amazon.com/exec/obidos/ASIN/0735710082/qid=1017162710/sr=1-1/ref=sr_1_1/103-4870944-6418218 Network Intrusion Detection: An Analyst's Handbook and http://www.amazon.com/exec/obidos/ASIN/0735710635/qid=1017162710/sr=1-2/ref=sr_1_2/103-4870944-6418218 Intrusion Signatures and Analysis Those two books will help understand some of the how/why's and what's of the IDS world. Good luck! ----- Erek Adams Nifty-Type-Guy TheAdamsFamily.Net _______________________________________________ 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:
- Speedera Alerts Kevin L Pawloski (Mar 25)
- Re: Speedera Alerts Erek Adams (Mar 25)
- Re: Speedera Alerts james (Mar 25)
- <Possible follow-ups>
- RE: Speedera Alerts Luo, Feng (Exchange) (Mar 26)
- RE: Speedera Alerts Erek Adams (Mar 26)