NAT vs. GRE tunnel

[Milon Papezik <mmp () actinet cz>]

Hi all,

one of our customers asked me following questions:

Is it possible to pass GRE tunnel throught a many-to-one NAT (hide NAT, PAT) ?
What FW product is capable of processing such conversion "transparently"?

I reviewed both RFC 1701 and RFC 2784 and I came to conclusion that it is not 
generally possible by definition of GRE tunnel to translate it through NAT.

What would be your expert's answer ?

        Thanks in advance for any thoughts,
        Milon
--
mmp () actinet cz

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