We are trying to configure a site-to-site VPN tunnel between our Cisco 3825 and our customer's Cisco 2621. Per our customer, their router is limited to transform set des/3des and sha/md5. We have configured all possible combinations but are still unable to get a successful connection. Phase 1 negotiates successfully but Phase 2 fails. Our router shows the following log:
614629: .Sep 20 14:09:53.578 CDT: IPSEC(validate_transform_proposal): transform proposal not supported for identity:
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...