i am doing a site-to-site vpn experiment with two router.one is 3660(Ra).another is provided by other(Rb).if Ra initiates the negotiation, a new isakmp sa can be got but authentication fails.otherwise Rb is the initiator, the isakmp sa negotiation can be finished normally.i migrated the configurations of Rb to a 3640 router unchanged.the negotiation of the phase 1 exchange is finished normally without regard to the direction.Rb's provider assured their products were compatible with RFC2409 strictly.does Cisco have some private policies in the authentication during the phase 1 negotiation?
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...