My experience with PIX code suggests keeping it current but not too current (unless theres a new feature you have to have). So as a rule, I always stay on the latest revision of the previous version. For example, theyre on 6.0(1) now, so Im running 5.3(2). When 6.1 comes out, Ill move to 6.0(last) unless I find reason to move sooner (bugs, features, or security advisories).
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...