Did you buy this box recently as new? As far as I know they were replaced by the standard UCS based servers.
The MSP servers that you have run under SUSE and therefore you can upgrade it from 6.3 to 7.2 (max) directly. I recommend a clean reinstall to 6.x and then the upgrade. It's nicely described in the V7 admin or also in this forum.
Licenses: you need licenses for V7. The smartnet con-xxx only gives you access to TAC and minor upgrades or hardware replacement. The BU has a special upgrade program to bring you to V7 for a small fee.
I am not sure if there is a software subscription service like in the UC world for this kind of products, maybe somebody can clarify.
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...