There is existing IPSEC VPN between two ISA servers, and now i want to replace the headend ISA with ASA with all the existing rules applied on it. Can you please advice me on anything that will help me on doing this? if there is additional thing to be done on the ASA please let me know?
There is no easy way of doing this. You will have to configure the VPN on the ASA per the following document and using the same parameters on the ISA to match the other end. Put the ASA into production during a maintenance window and troubleshoot any issues with the connection.
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...