On Tue, Sep 22, 2009 at 12:52:51PM -0400, Scott C Moonen wrote:
> Hi Matt.  Our implementation works a little differently from Tero's, so 
> I'm replying just to provide a different perspective.

<mucho snippage deleted!>

> Our design decision does prevent our implementation from initiating to a 
> remote IPsec gateway if that gateway is behind a NAT, since we have 
> excluded the possibility of configuring addresses in the network behind 
> that NAT.  We believe that initiating to a gateway behind a NAT is an 
> uncommon configuration, especially for our platform.

Your design (which is similar to the one in Solaris/OpenSolaris) WOULD allow
initiation to a behind-a-NAT peer if (and only if) the NAT was smart enough
to redirect 500 and 4500 to a single entity inside its private network.
(I'll be experimenting with this directly when I move into my new house this
weekend, actually.  :)

Dan
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