Currently we are using Windows 2003 for dhcp with the inside interface of the firewall as the default gateway. If I configure Active/Standby then the internal interface IP addresses changes once failed over. Is there something that I am missing here?
It doesn't change the IP address. Even though when you configure active/standby you give the standby firewall it's own IP address if the primary firewall fails then the IP address the primary firewall was using ie. your default-gateway, will move across to the standby firewall.
You give the standby firewall it's own ip address for monitoring purposes and also so you can connect to the standby firewall for management purposes.
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...