For that your configurations needs to be strict, no traffic should be allowed over native vlans, instead they should be specified in access vlans. Do not set the trunks to auto negotiate. Such steps can be taken to mitigate such L2 attacks and gain access to your DMZ resources without passing through the ASA.
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...