I'm using a 877w Cisco router as endpoint for L2TP2 tunnels. I use an Microsoft IAS (radius) for the authentication. Until last week, all wwas working fine, but now, when my clients tries to establish an L2TP tunnel, the tunnel is established but after 20 seconds the tunnel is suddenly disconnected.
This is the output for "debug vpnd events" command:
Dec 16 15:33:57.334: VPDN Received L2TUN socket message <xCRQ - Session Incoming>
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...