Using NAT through a Tunnel Interface on a 1921 router
My company just acquired another organization and they have the same subnet as another recent acquisition. I have a tunnel interface configured on their 1921 router (running 15.2) to my firewall and I can ping through to the tunnel's IP from HQ and vice versa. The problem is that I cannot reach the LAN since there is another VPN tunnel at HQ using 192.168.1.0/24. Is there a way on a 1921 to apply a NAT statement to essentially masquerade the subnet so at HQ it looks like 172.16.131.0/24 instead of 192.168.1.0/24? I would need to do this on the router since my Palo Alto firewall cannot NAT the destination coming into HQ. At the same time the router is being used for Internet access with a NAT pool. I have attached the config below if anyone has any ideas.
Re: Using NAT through a Tunnel Interface on a 1921 router
There should not be any reason you can't mark ip NAT outside on the GRE interface towards this location and update the NAT statements accordingly. I would also update the your NAT statements and use route maps to match the interface
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