When configuring Active Standby ASA firewalls do you need a standby address? The problem I have is that we have a single customer WAN link with single IP address but two firewalls.
I think the answer to my question is not to configure a Standby address for failover and set the interface to be not monitored, but I'm not sure and have no way to test other than a live environment, which is not going to happen, hence my question.
The standby IP address is recommended, but not required for failover to work. Just keep in mind that you won't be able to access the Standby unit on that interface, and as you mentioned interface monitoring won't work.
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...