i guess you are refering to PDM here ,if yes ofcourse you require the PDM software in your FW to have GUI based access to configure your FW but do remember that you have gotta necessary Java Virtual Machine package installed to access the PDM.
for more info do find this link which talks about PDM ..
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...