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RE: Do we need L2TP additionally in following IPSec-ed case?

As I understand, the advantage of using IPSec secured L2TP sessions, as opposed to IPSec alone, is the fact that PPP can be used to configure the dial-up-user's IP connection.
 
In this way, the dial-up-user can appear to be on a subnet assigned by the corporate server.
 
In the 'pure IPSec' scenario, the IP address of the user must appear to the corporate network as the address assigned by the ISP.
 
A newcomer to IPSec, I'm not aware of any IPSec interface configuration facility.
 
Hope this helps,
Mick
-----Original Message-----
From: HyungTech H [mailto:hhkte@yahoo.com]
Sent: 15 March 2000 00:52
To: ipsec@lists.tislabs.com
Subject: Do we need L2TP additionally in following IPSec-ed case?

Hello,

I wonder whether IPsec combined with L2TP has more
advantage over IPSec alone:


Dial-up User <===(1)======>RAS based on Radius(provided by ISP)
Dial-up User  <====(2)=====>IPSec GateWay to companyA's Premise

(1): Dial-up User establishes InternetConnection using ISP

(2): Using IPSec remote Client(on Windows), the user exhanges data(TCP/IP, NetBios) with some host within companyA's Premise protected by IPSec GateWay.

In above case, do we need to use L2TP  additionally for intensifying security?

If so  , can you tell me details?

 


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