I've got an ASA 5520 with a site to site tunnel to an ASP. They're going to change the IP address on their VPN server soon. Is there a way I can just change the IP address of the connection profile or do I have to start from scratch?
We do not know how you have configured the VPN on your ASA and therefore there might be aspects of your config to which my comments do not apply. But in general it should be quite possible for you to just change the address several places in your config (the critical one is the set peer statement in the crypto map - there might be other references depending on how you configure some aspects). You should be able to remove the old set peer, and add a new set peer.
Note that changing the peer address in the config does not impact the existing tunnel. So you may need to stop and restart to get the tunnel to initialize and use the new address. And you would need to coordinate your change with the change that the ASP is making.
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...