VPN Gateway And Nat

[LE CORVIC Y InfoEdpEtcDep <Yoann.Le-Corvic () socgen com>]

Hi All,
 
I have a slight problem with a VPN configuration, and wanted to know if you
all can help. Basically, here is the situation :
 
PROTECTED_NET-------VPNGATEWAY --------ROUTER-----ClientSecuremote
 
The public IP Adress of the VPN GATEWAY is natted at the ROUTER, so that the
ClientSecuremote doesn't access the real IP Adress of the VPNGATEWAY, but
one on the ROUTER.
 
The intiation sequence works, and the authentication as well, be when the
network topology is downloaded, no access is possible on servers of the
PROTECTED_NET.
 
I suspect that after topology download, the real IP Adress of the gateway is
given to ClientSecuremote, which uses it for the remaining of the
communication.
 
Is there a way to go around that problem, or is it a lost cause... ?
 
Thanks for your help.
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