Snort mailing list archives

Re: Snort with IPSec


From: "Josh Berry" <josh.berry () netschematics com>
Date: Tue, 4 Nov 2003 13:02:36 -0600 (CST)

I understand the overhead and difficulty.  I just want to know if it is
technically feasible.  The reason I am asking is that one of the directors
where I work is considering implementing site wide IPSec encryption for
every connection on the internal network.  This will make internal attacks
impossible to see, therefore I cannot just sit the IDS behind the VPN
because essentially the whole network will be one big VPN.


"Josh Berry" <josh.berry () netschematics com> writes:

Are there any plugins for Snort, or is there any way with Snort, to
decrypt IPSec traffic and then analyze for malicious traffic (given that
snort has the key to decrypt with)?  Is there any reason this would be
impossible?

Packet loss, processing time, and implementation time are the biggies :)

--
Chris Green <cmg () sourcefire com>
 "Not everyone holds these truths to be self-evident, so we've worked
                  up a proof of them as Appendix A." --  Paul Prescod


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