The IronPort ESA does not currently have any facilities to provide failover or load balancing. This functionality would need to be provided through other means such as DNS. AsyncOS does provide centralized configuration management but this is limited to sharing the configuration between appliances and does not apply to clustering for mail flow.
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...