Snort mailing list archives
re: tcpdump expression
From: Roelof JT Jonkman <roel () silicondefense com>
Date: Fri, 09 Nov 2001 19:55:46 -0800
Greg, Just got home, running snort 1.8.1 with libpcap 0.4.1, however I tried on one of the other machines, which has 1.8.2 with libpcap 0.6.2, and no worky... Nothing I tried sofar... I'll try to figure this out, looks like a bug of some sort in the latest version of pcap. I suspect something like the following is the case: the last two significant octetis of the network are 88.0, this is in binary the following: 0101 1000 . 0000 . 0000 ^ | The problem it's bitchin about is that marked bit (^) is set and is within the mask, /20 (|) that is, so the last 12 bits are insignificant. Now I'm not sure if the network number is valid from a CIDR standpoint right of the top of my head. (Just for jollies try 134.117.80.0/20 and see it work.) I'll dig some more after dinner, and get back to you roel _______________________________________________ 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:
- re: tcpdump expression Roelof JT Jonkman (Nov 09)
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- re: tcpdump expression Roelof JT Jonkman (Nov 09)