I have a PIX520 that is giving me this error repeatedly:
403102: PPP virtual interface 1 rcvd pkt with invalid protocol: b1, reason: unkown or unsupported protocol
when I connect a PPTP VPN connection, it will connect but will not pass any traffic. It was working fine one day and then this started, I didn't change anything. Is this and indication of a bad network card? Other than this it is working fine.
This is usually a problem with the Radius server you're authenticating to and MPPE encryption. Try turning off the encryption in the PIX vpdn config, and also try doing local user authentication with encryption and see if that works. If they do work, then you need to look at the config on your Radius server as per this:
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...