yes.

Quoting Nicolas Saurbier (Nicolas.Saurbier@biodata.de):
> Hi All
> 
> is IPnat capable of doing a reverse NAT based on protocols???
> My problem is, that I need to map incoming ESP-packets (proto 50)
> to an internal (RFC1918) IP-address.
> 
> P.S.: Just say "YES" or "NO"  ;-)
> 
> NIC
>