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SSL VPN and Double NATTING

Hi,

I am facing the following problems ...can any one guide me to resolve this issues.

1. My ADSL termination at the ADSL interface of the Service provider's ADSL router.Which can not be eliminated.

2.The service provider's router ethernet port is connected to a Nortel 1750 Contivity 1750 VPN router,to its public interface.

3.This Nortel's private interface is connected to a Outside Interface of the Cisco ASA5510 VPN /SSL VPN enabled box.

4.Now I have to give internat access to my inside network,DMZ network.

5.For mobile users I should give access to HRM server and Exchange servers which are in DMZ zone.

6.I am little confused since there are 2 L3 device infront of the Cisco ASA5510.

I really do not know how to NAT and assign ACLs.

But without the Nortel Contivity 1750 VPN router,I could configure the NAT,Static NATa and ACLs.

Please guide me.

Regards,

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