I have a remote ASA. This has a site-to-site VPN tunnel to the core ASA. The remote site LAN subnet is a duplicate of one already known in the core. For various reasons we can't change either at the moment.

I'm trying to find a way that we can NAT the remote site (on the remote ASA maybe) to a different pool of addresses before passing the traffic down the VPN tunnel. I've been scratching my head trying to work out how to do this. Has anyone got a suggestion? thanks.