From: dwhitley@xxxxxxxxx
Date: Thu Feb 07 2002 - 16:20:45 GMT-3
Try this link it explains the NAT order of operations on Cisco IOS
http://www.cisco.com/warp/public/556/5.html
-----Original Message-----
From: RSiddappa@NECBNS.com [mailto:RSiddappa@NECBNS.com]
Sent: Saturday, February 02, 2002 11:54 PM
To: jkaberna@netcginc.com; erickbe@yahoo.com; signal@shreve.net;
cchurch@MAGNACOM.com; tkc9789@hotmail.com; ben@kesslerconsulting.com
Cc: ccielab@groupstudy.com
Subject: NAT first and then encrypt it ????(Cisco behavior)
Now, it is clear that NAT will happen first and then the encryption. ( I am
also thinking that when routing and NAT are together, NAT happens first and
then Routing).
Question is :
1.Is it Only Cisco implementation that does NAT first then Encrypt or it is
some standard.?
2. Was there a reason for them to implement like this or it is the behavior
of the IOS. ( I was also Just thinking about using NAT and IPSec for some
VoIP application- just an another problem)
Thank you every one.
Rajeev.
-----Original Message-----
From: John Kaberna [mailto:jkaberna@netcginc.com]
Sent: Saturday, February 02, 2002 8:40 PM
To: Siddappa, Rajeev; erickbe@yahoo.com; signal@shreve.net;
cchurch@MAGNACOM.com; tkc9789@hotmail.com; ben@kesslerconsulting.com
Cc: ccielab@groupstudy.com
Subject: Re: IPSec & NAT
You are basically correct. The actual term is "encapsulating" when talking
about the packets that go over IPSec using the public address.
John Kaberna
CCIE #7146
www.netcginc.com
(415) 750-3800
Instructor for CCIE R/S and Security 5-day class www.ccbootcamp.com
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