When nat-control is enabled a nat rule is needed for traffic between interfaces with different security levels.
I believe you can disable nat-control (no nat-control) and still use nat translations on the interfaces that you need to: inside to outside for example with a nat and global rule. But nothing on dmz to inside/outside.
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...