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[Bug 294564] Re: PPTP connection frequently dropped with "short read (-1)"

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <294564@xxxxxxxxxxxxxxxxxx>
Date: Thu, 01 Sep 2011 15:55:13 -0000
Reply-to: Bug 294564 <294564@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

*** This bug is a duplicate of bug 278309 ***
    https://bugs.launchpad.net/bugs/278309

** Changed in: network-manager-pptp (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/294564

Title:
  PPTP connection frequently dropped with "short read (-1)"

Status in “network-manager” package in Ubuntu:
  Incomplete
Status in “network-manager-pptp” package in Ubuntu:
  Confirmed
Status in “ppp” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: network-manager-pptp

  Package: 0.7~~svn20081015t024626-0ubuntu1

  Since Ubuntu 8.10, my office VPN connection (PPTP) frequently drops
  with:

  Nov  6 07:46:18 Antares pptp[6352]: nm-pptp-service-6346
  warn[decaps_gre:pptp_gre.c:331]: short read (-1): Message too long

  Actually, this happens when generating traffic by e.g. calling web
  sites that are routed over VPN (office intranet) or when working with
  an RDP connection over VPN, but _not_ when being connected to my
  office machine with a VNC session over VPN (strange though).

  Is this perhaps related to the missing MTU configuration since NM 0.7?
  The VPN connection, when established, reads as follows:

  [..]
  Nov  6 07:41:19 Antares NetworkManager: <info>  Maximum Segment Size (MSS): 0
  [..]

  and

  ppp0      Link encap:Punkt-zu-Punkt-Verbindung  
            inet Adresse:x.x.x.x  P-z-P:x.x.x.x  Maske:255.255.255.255
            UP PUNKTZUPUNKT RUNNING NOARP MULTICAST  MTU:1452  Metrik:1
            RX packets:1725 errors:0 dropped:0 overruns:0 frame:0
            TX packets:1218 errors:0 dropped:0 overruns:0 carrier:0
            Kollisionen:0 Sendewarteschlangenlänge:3 
            RX bytes:522551 (522.5 KB)  TX bytes:78426 (78.4 KB)

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