Thanks for the information--I think I'm getting closer to understanding. I currently have all servers and workstations set up with addresses from the 1/2 class c address space. For reasons I won't bore you with, I'm very reluctant to change these to RFC 1918 addresses, particularly the servers. So, given this, I'm still not sure how to configure the inside and outside PIX interfaces.
Can I use an RFC1918 address on the internal interface yet leave all network devices to continue using the class c addresses?
You should use private addresses on your dmz and internal networks. Use the public addresses for the external interface on your firewall, the internal interface on your wan router, and for static and dynamic nat.
Disallow echo (ping) trafic on the firewall's external interface.
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...