An active/standby failover cluster will provide for hardware redundancy but only one ASA will be active at any one time. A load balancing cluster will enable multiple member ASAs to service remote access VPN connection requests. The docs below cover both features in detail.
There are no limitations regarding firewall policies or NAT. You will, however, need to independently manage the overall configuration for each ASA in the cluster. For example, if you configure a custom WebVPN portal page, you will want to ensure that this same object is positioned and configured on all of the member ASAs so that the connecting users get the same experience.
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...