How to setup NAT Excemption for Site to site and Remote VPN in Cisco ASA version 8.3

—-For Site to Site VPN—-

Suppose topology is 192.168.10.0/24 inside(ASA1)outside ===VPN=== outside(ASA2)inside 192.168.20.0/24
So on the ASA1 you can configure NAT Exception look like this

object network local-obj
subnet 192.168.10.0 255.255.255.0

object network remote-obj
subnet 192.168.20.0 255.255.255.0

nat (inside,outside) 1 source static local-obj local-obj destination static remote-obj remote-obj

—-For Remote VPN—-

Suppose topology is 192.168.3.0/24 (vpnclient pool) ===VPN=== outside(ASA1)inside 192.168.10.0/24
So when you will configure ASA1 it will look like this

object network obj-vpn_pool
subnet 192.168.3.0 255.255.255.0

nat (inside,outside) 1 source static any any destination static obj-vpn_pool obj-vpn_pool