Snort mailing list archives
Re: ARP Spoof does not show MAC
From: "Stephen W. Thompson" <thompson+snort () pobox upenn edu>
Date: Fri, 2 Apr 2004 10:35:39 -0500 (EST)
"Kim Wall" <kwall () the4walls net> wrote:
I was hoping someone can clue me in on what is happening. I am using Snort with packet sampling. I currently have my entire network sending sampled packets to a single Snort sensor. Obviously, I have had to trim the rules files in order to make sense in a sampled environment. I have recently configured ARP Spoof, but the alerts in the alert file do not include the MAC address of the offending datagram (the one performing ARP poisoning).
I discovered similar behavior last week, by chance. Even with the -e and the -X flags, I could not get "snort -dv 'arp'" to show the MAC addresses, and I, too, was trying to understand ARP poisoning. I switched to tcpdump (with "-v -v -n -l -x -e -s 2000" flags) and found that it *did* show MAC addresses, even for packets saved by snort and for which snort still did not show MACs. So for now, I use tcpdump for that situation (and for non IP traffic), and snort otherwise. (Yeah, I could throw ethereal into the mix, too...) However, after that work, I return to a theme that's been mentioned several times before in this forum. When analyzing MACs on a subnet, arpwatch may be a more appropriate tool than snort. [Caveat: I've not used the plugins for snort such as ARP Spoof yet.] En paz, Steve ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ 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:
- ARP Spoof does not show MAC Kim Wall (Apr 02)
- Re: ARP Spoof does not show MAC Stephen W. Thompson (Apr 02)
- <Possible follow-ups>
- ARP Spoof does not show MAC Kim Wall (Apr 05)