Snort mailing list archives
Re: IP Range Problems
From: Rich Adamson <radamson () routers com>
Date: Wed, 9 Jul 2003 11:21:26 -0600
Actually, I would not even recommend that. I like the original /22 and /24 answer, especially since one would also want to look at Network (10.5.0.0) and Broadcast (10.5.4.255) probes and DoS attacks. I imagine the poster was not being quite literal. It would be a mistake to leave those out.
<cut>
var HOME_NET [10.5.0.1/32,10.5.0.2/31,10.5.0.4/30,10.5.0.8/29,10.5.0.16/28,10.5.0.32/27,10.5.0.64/26,10.5.0.128
/25,10.5.1.0/24,10.5.2.0/23,10.5.4.0/25,10.5.4.128/26,10.5.4.192/27,10.5.4.224/28,10.5.4.240/29,10. 5.4.248/30,10.5.4.252/31,10.5.4.254/32] I think we've pretty much beat this one to death, but there is one more small consideration. The /22 definition assumes contigous addresses from bottom to top with a "single" broadcast address. If the original poster is using individual class-b definitions within his network (eg, servers, routers, etc), then the snort definitions should follow those existing definitions. One "could" specify a very large number of CIDR combinations that would include the adjacent IP addresses, but technically he should be using his "real" addressing scheme. Without knowing his exact implementation, many of the posted responses could be either right on, or wrong. Rich ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps _______________________________________________ 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:
- IP Range Problems Ryan Vennell (Jul 08)
- <Possible follow-ups>
- RE: IP Range Problems Hutchinson, Andrew (Jul 08)
- RE: IP Range Problems Esler, Joel Contractor (Jul 08)
- Re: IP Range Problems James Nonya (Jul 08)
- RE: IP Range Problems Nelson, Ben (Jul 08)
- Re: IP Range Problems Brian (Jul 08)
- Re: IP Range Problems Bryan Irvine (Jul 08)
- Re: IP Range Problems Brian (Jul 08)
- RE: IP Range Problems Hutchinson, Andrew (Jul 09)
- Re: IP Range Problems Marc Quibell (Jul 09)
- Re: IP Range Problems Rich Adamson (Jul 09)
- IP Range Problems Ryan Vennell (Aug 06)
- Antwort: IP Range Problems m . stiefenhofer (Aug 06)
- Re: Antwort: IP Range Problems Erek Adams (Aug 06)
- Re: IP Range Problems lists (Aug 06)
- Antwort: IP Range Problems m . stiefenhofer (Aug 06)