I have 2 duplicate REMOTE lans connecting via VPN with the ip address of 192.168.70.X and 192.168.70.x
One is already working but I don't know how to add the second one which is enumerated
exactly the same. Not quite sure on how to apply the NAT on my Local Router for the second duplicate subnet.
I found this article but it talks about duplicate lans on both sides and it does NOT apply
Is there anything similar but with 2 REMOTE LAN Subnets?
AFAIK you will have to do it on the remote end. The problem is that if you have the same address eg 192.168.1.70 arriving from both sites at the same time VPN device at your end will get very confused as to where the return traffic should go.
You can NAT the source IP addresses on your local router for one set of the 192.168.70.x addresses but i still think the VPN device would not be able to determine which tunnel to send the traffic down on the return path.
I appreciate it's not always easy to get the 3rd party to do something but i think this is your only choice.