We have two different security mechanisms - ESP and AH. ESP provides Authentication,Intigrity and Encryption while AH provides Authentication and Intogrity only. Why do we need to use both mechanisms combinly in a tunnel? Why dont we use ESP alone or AH alone? Please correct me if I am wrong.
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...
[toc:faq]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 and UDP are I...