IPSec vs. IPSec/L2TP

[Bénoni MARTIN <Benoni.MARTIN () libertis ga>]

Hi list,

I was wondering how much the security is enhanced by using L2TP/IPSec tunnelling instead of a good old IPSec tunnel. I 
found a lot of information googling around the web, but couldn't find a good paper explainig this enhancement (or not).

If anyone cound give me any hint, personnal experience feedback or URL, this will be appreciated !

Thx !

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