i dont think u need any hardware for upgrading IDS 4235.. the only criteria for the IPS 5.0 upgrade is the memory .. make sure you have sufficient DRAM... i guess u need to have 512 Mb memory on the IPS box...
you must first upgrade your IDS software to 4.1... see the release notes of each version and make sure you have the base version of the software running... release notes can be found in the following URL:
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...