I have seen 3-4 posts with the same problem. No one, even cisco don't know the fix.
Using a cisco VPN client to a cisco router. I have put in no nat so I can ping the internal machines via ip and DNS name. The client has Nat Transparency but that doesn't matter. I have seen this setup working with netscreens which support nat traversal.
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...