With all due respect, but if you haven't worked with the PIX firewalls before, you might want to obtain some assistance from an experienced consultant. A firewall with 6 interfaces and that require communications between each other is indeed complicated and prone to errors. Your firewall is too important to be used as a 'learn on the spot' device.
I am sure that there are experienced consultants near your area or you could contact Cisco to obtain a recommendation.
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...