i am trying to create a LAN-to-LAN tunnel with a third party where we have overlapping address ranges and they are unable to do NAT. Can i use a LAN-to-LAN NAT rule to just tranlsate his source ip's to a range of my choice which i can route thru my network and then translate back before going back thru the tunnel.
I found a doc where NAT translations take place both ways on a single router using the ip nat inside source and the ip nat outside source commands, though I'm not sure this will work with IPSec. Please refer to http://www.cisco.com/warp/public/556/3.html.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...