The benefit of having any server in a DMZ is that if that server becomes compromised, the attacker still doesn't have any access to internal hosts. If the server is sitting on the inside and someone can get root access to it, then they have an open connection into your network.
With a DMZ you should only allow the specific ports from the outside world, and don't allow any connections to be established FROM the DMZ to the inside network, but allow inside users to connect otthe DMZ freely (the default behaviour with the PIX).
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...