A great PPTP stumper!

Discussion in 'Windows Networking' started by =?Utf-8?B?Q2xldHVzIFNjYWxv?=, Nov 11, 2004.

  1. I have a customer running SBS 2003. They are using PPTP connections over
    broadband to connect remotely to their server and everything is working well.
    The server is connected to the Internet with DSL (500k to 750K) using the
    built in firewall with SBS and two NICS, one for the WAN side and one for the
    LAN side. The users that connect using PPTP that are working well are
    connecting via cable Internet or DSL links 384K and under. However, one of
    the remote users must use StarBand Satellite service to connect to the
    Internet because of the abscence of DSL or Cable in their area. StarBand
    guarantees a minimum of 150k connectivity. This users Internet access for
    browsing and downloading performs well for the speed of the line. A line
    speed test from the Internet says this user is getting an average of 500k
    bandwith. When I try the PPTP connection to the same SBS Server(that the
    other users have no trouble with) I can connect and start to transmit data
    but the connection is always lost within 5 minutes. I enabled logging of the
    RAS server and captured some logs of the user that are not having problems
    and compared them to the user that is having the problem. The only difference
    between them is the length of time that they stay connected.
    The Acct-Terminate-Cause field is User-Request 1 in all cases, both with the
    users that are not having the problem and the user that is having the
    problem. I have a theroy that the satellite Internet access is too slow to
    maintain the PPTP connection but the logs do not seem to prove this out. I
    would expect to see the Acct-Terminate-Cause be something different on the
    problem users trace. It looks as if the client side of the connection
    requests the connection to terminate. Is there a registy setting that could
    make the server or in this case the client more tolerant of a slow
    connection? Anyone have any thoughts?
     
    =?Utf-8?B?Q2xldHVzIFNjYWxv?=, Nov 11, 2004
    #1
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  2. =?Utf-8?B?Q2xldHVzIFNjYWxv?=

    Cleve S. Guest

    Cletus,

    I have users that connect to the internet via 56k dial-up, then PPTP to a
    SnapGear router. It's really slow, but it works. I would reconsider your
    slow connection theory & look elsewhere. Wish I could be of more help.

    Cleve S.
     
    Cleve S., Nov 11, 2004
    #2
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  3. =?Utf-8?B?Q2xldHVzIFNjYWxv?=

    Bill Grant Guest

    The problem with satellite connections isn't so much the bandwidth, but
    the latency. Response times can be pretty slow. My guess is that this is
    causing something to time out and let the connection drop.

     
    Bill Grant, Nov 11, 2004
    #3
  4. Yes Bill, I think you are right. Thank you.

    And thank you Cleve!

     
    =?Utf-8?B?Q2xldHVzIFNjYWxv?=, Nov 12, 2004
    #4
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