Snort mailing list archives
Re: Why is this rule still being tripped?
From: Martin Roesch <roesch () sourcefire com>
Date: Sat, 17 Jan 2004 16:17:15 -0500
Hi Orion, Can you try:var PUBLIC_NET [!65.171.192.0/24,!192.168.0.0/24,!65.104.69.192/27,!207.202.149.0/24,! 12.105.80.64/27,!69.9.9.160/27]
There might might be an issue with the way the lists are processed. Try that and let me know how it goes.
-Marty On Jan 13, 2004, at 3:24 PM, Orion Poplawski wrote:
Martin Roesch wrote:Have you tried making a negated TRUSTED_NET set and using that instead of the global negation? I need to look at the logic, but I think that none of the IPs in TRUSTED_NET can match for the rule to fail.Have you tried it with just the one net you want to ignore to narrow it down to the IP list?-MartyWell, this doesn't change anything (as you would expect):var TRUSTED_NET [65.171.192.0/24,192.168.0.0/24,65.104.69.192/27,207.202.149.0/ 24,12.105.80.64/27,69.9.9.160/27]var PUBLIC_NET !$TRUSTED_NETalert icmp $PUBLIC_NET any -> $HOME_NET any (msg:"ICMP PING"; itype: 8; icode: 0; sid:384; classtype:misc-activity; rev:4;)What I don't understand is that I have: var HOME_NET [65.171.192.0/24,192.168.0.0/24] var EXTERNAL_NET !$HOME_NETand those rules work. Perhaps it is an issue when both IP addrs are negated lists?If I do: var TRUSTED_NET 65.104.69.192/27 var PUBLIC_NET !$TRUSTED_NET Then the rule does not trip on $PUBLIC_NET->$HOME_NET traffic. -- Orion Poplawski System Administrator 303-415-9701 x222 Colorado Research Associates/NWRA FAX: 303-415-9702 3380 Mitchell Lane, Boulder CO 80301 http://www.co-ra.com
-- Martin Roesch - Founder/CTO, Sourcefire Inc. - (410)290-1616 Sourcefire: Intelligent Security Monitoring roesch () sourcefire com - http://www.sourcefire.com Snort: Open Source Network IDS - http://www.snort.org ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ 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:
- Why is this rule still being tripped? Orion Poplawski (Jan 09)
- Re: Why is this rule still being tripped? Martin Roesch (Jan 10)
- Re: Why is this rule still being tripped? Orion Poplawski (Jan 13)
- Re: Why is this rule still being tripped? Martin Roesch (Jan 17)
- Re: Why is this rule still being tripped? Orion Poplawski (Jan 19)
- Re: Why is this rule still being tripped? Orion Poplawski (Jan 13)
- Re: Why is this rule still being tripped? Martin Roesch (Jan 10)