This is a feature we have committed to the 7.0 release of PIX code. From what I understand, this feature will only apply to VPN traffic. The timeframe for the 7.0 release is still unknown but best guess at this time is this fall. If you need something sooner than that, you may need to come up with some other options. Hope this helps.
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...