We need to create a L2L tunnel with a provider but their standard is that they require us to PAT our internal segments\hosts (AKA "interesting traffic") to a public address. By that they mean an address in the same segment as the OUTSIDE interface of our firewall, even the Internet address itself.
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...