[Snort-users] Snort with IPSec

O'Flynn, Derek DOFlyn at ...6551...
Tue Nov 4 09:47:11 EST 2003

AFAIK not possible to do.  You could place your sensor behind the VPN device
so you could detect malicious information as it enters the network.


-----Original Message-----
From: Josh Berry [mailto:josh.berry at ...10221...] 
Sent: Tuesday, November 04, 2003 11:12 AM
To: snort-users at lists.sourceforge.net
Subject: [Snort-users] Snort with IPSec

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

Sorry, I do not know enough about IPSec to understand whether this would
be possible or not, but it seems like it would be similar to ettercap's
ability to view SSL traffic when you have the certificate that is being
used.  If you could provide the IDS with the keys, would this be possible?

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