When the Client tries connecting to the PIX or any other VPN device, it will send almost all set of IKE Proposals to the PIX and the PIX will match it to the first policy and then the second and then the next policy sent is matched the same way, and finally one of the sent policies either matches the first or second defined on the PIX and thats what they use.
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...