For the VPN tunnel to work when terminated on the loopback it would also be necessary to configure the crypto map local-address command. By default the crypto will use the address of the outbound interface. So when terminating the VPN on the physical interface local-address is not needed. To use the loopback you need the configuration command to change the address used from the physical outbound interface to the loopback.
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...