PPTP connection over another PPTP connection

From: Vladimir Grebenschikov (vova_at_sw.ru)
Date: 11/18/04

  • Next message: Tilman Linneweh: "Re: kern/72502: [patch] TCP should honour incoming RSTs even if the receive window is closed" 
    To: freebsd-net <net@freebsd.org>
Date: Fri, 19 Nov 2004 01:11:38 +0300

    Hi

    Does anybody knows Is subject possible with mpd ?

    I have tried both single mpd with two links and two mpd on different
    machines - no luck.

    Looks like one mpd does not allows receiving GRE packets inside its
    traffic.

    I see only following packets on internal link (that inside another link)

    [sw] LCP: Up event
    [sw] LCP: state change Starting --> Req-Sent
    [sw] LCP: phase shift DEAD --> ESTABLISH
    [sw] LCP: SendConfigReq #199
     ACFCOMP
     PROTOCOMP
     MRU 1500
     MAGICNUM d0599088
     MP MRRU 1600
     MP SHORTSEQ
     ENDPOINTDISC [802.1] 00 0e 35 03 82 74
    [sw] LCP: SendConfigReq #200
     ACFCOMP
     PROTOCOMP
     MRU 1500
     MAGICNUM d0599088
     MP MRRU 1600
     MP SHORTSEQ
     ENDPOINTDISC [802.1] 00 0e 35 03 82 74
    [sw] LCP: SendConfigReq #201
     ACFCOMP
     PROTOCOMP
     MRU 1500
     MAGICNUM d0599088
     MP MRRU 1600
     MP SHORTSEQ
     ENDPOINTDISC [802.1] 00 0e 35 03 82 74
    [sw] LCP: SendConfigReq #202
     ACFCOMP
     PROTOCOMP
     MRU 1500
     MAGICNUM d0599088
     MP MRRU 1600
     MP SHORTSEQ
     ENDPOINTDISC [802.1] 00 0e 35 03 82 74
    [sw] LCP: SendConfigReq #203
     ACFCOMP
     PROTOCOMP
     MRU 1500
     MAGICNUM d0599088
     MP MRRU 1600
     MP SHORTSEQ
     ENDPOINTDISC [802.1] 00 0e 35 03 82 74

    Also by tcpdump I see outgoing packets but didn't see incoming.

    Any ideas ? 

    -- 
Vladimir B. Grebenschikov
SWsoft Inc. vova@sw-soft.com
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