Snort mailing list archives
Re: ignoring an interface
From: Erek Adams <erek () theadamsfamily net>
Date: Mon, 12 Aug 2002 17:49:04 -0700 (PDT)
On Mon, 12 Aug 2002, Paul Greene wrote:
How do you ignore an interface with snort?
errr.... Not really any need to--In my world that is. :)
i.e. I have a working stealth IDS with two layer 2 interfaces monitoring all the traffic flowing between these two interfaces; this seems to be working fine. However, I want to add a third interface that'll connect to an isolated network for administrative purposes; no one can get to that network unless they are physically inside my house (if that happens, I've got bigger things to worry about!) How would I ignore that 3rd interface, which should never have any interesting traffic running on it to worry about?
Under normal conditions, snort won't look at any interface except the 'first one'. If you are using snort with "-i any", then this doesn't hold true. Not to mention that "-i any" only works on newer kernels, sorry--I don't have the number ATM. Check the FAQ, it's there. One thing that you might consider is a BPF filter to ignore the "net" that you need to. snort <options> "not net <new_interface_net>" You could also use a pass rule, and the -o parameter. snort -o <options> and in the rules file: pass <ignore_net>/<CIDR notation> -> $HOME_NET ... For more info on ignoring things, have a look at: http://www.theadamsfamily.net/~erek/snort/ignore.txt Hope this helps! Cheers! ----- Erek Adams Nifty-Type-Guy TheAdamsFamily.Net ------------------------------------------------------- This sf.net email is sponsored by: Dice - The leading online job board for high-tech professionals. Search and apply for tech jobs today! http://seeker.dice.com/seeker.epl?rel_code=31 _______________________________________________ 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:
- ignoring an interface Paul Greene (Aug 12)
- Re: ignoring an interface Erek Adams (Aug 12)