Snort mailing list archives
Ignore Hosts How-To
From: Erek Adams <erek () theadamsfamily net>
Date: Fri, 7 Jun 2002 11:43:18 -0700 (PDT)
Ok, you have two basic options on ignoring hosts: BPF Filters Pass Rules Both ways provide you with the potential to completely _blind_ your sensor to all traffic. This would be a 'Bad Thing(tm)'. Here is a basic example of how-to ignore a host with for each method. Are they perfect? No. Want to improve and/or correct them? Sure! Feel free! To ignore ICMP ECHO-REQUESTS (pings) and ICMP-ECHO REPLY's (ping reply) from host <foo> using BPF: not ( (icmp[0] = 8 or icmp[0] = 0) and host <foo> ) To ignore ALL ICMP traffic from host <foo> using a pass rule: pass icmp <foo> any -> $HOME_NET any And you _MUST_ start snort with the '-o' parameter for the pass rule to work correctly. Anyone else got a better rule and/or filter? ----- Erek Adams Nifty-Type-Guy TheAdamsFamily.Net _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ 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
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- Ignore Hosts How-To Erek Adams (Jun 07)