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WAN Miniport L2TP / IKEv2 Drivers Locking up RRS feed

  • Question

  • Hi all,

    We have a number of sites which have L2TP / IKEv2 VPNs configured (various server/router hardware and configurations). In all cases though we use the Windows 10 in-built vpn client to connect and all are configured with pre-shared keys and typically RADIUS authentication linked to a Windows NAP server. 

    For a large number (if not all) of our clients we regularly see the WAN Miniport drivers locking up and you have to either logout/login or manually restart the drivers in device manager to get them going again. These clients all use different versions of Windows 10 and different hardware configurations but the problem is always the same on each.

    The VPN client will usually get as far as "verifying username / password" and not get any further.  In the event log you will see different RAS errors, usually 79 I think it is or 89 (whichever the standard, couldn't connect error code is. when it connects successfully you also will sometimes find that the network connection on the client (via all adaptors) is completely broken after disconnecting the VPN and can only be fixed by disabling/enabled the WAN Miniport drivers.

    Anyone seen this before and know of a fix?

    Cheers,

    Olly


    Olly

    Tuesday, July 16, 2019 8:00 AM

All replies

  • Hi,

    Do you mean that VPN stuck on "connecting" in windows 10?

    There is a workaround for your reference.

    • go to Windows Settings > Network & Internet > VPN menu.
    • select a VPN from the menu and Connect. 

    Best regards,

    Travis


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    Wednesday, July 17, 2019 1:31 AM
    Moderator
  • Hi Travis,

    Thanks for your reply! I think we are talking about two different issues here. In Windows 10 1903 a new bug has been introduced which causes the issue you describe. In this scenario there are no RASClient errors in the event log, it's just that the button for VPN in the task bar doesn't seem to do anything.

    In the issue I'm talking about, you will see RASClient errors in the event log when you try to connect. You will also sometimes find that the virtual network adapter gets stuck i.e. if you run ipconfig / all you can see the adapter in a corrupt state even if in the control panel the adapter appears to be disconnected. It will often retain an IP address and say "disconnecting" but never disconnnect. 

    Sorry I should have explained this in the original post

    Cheers,

    Olly


    Olly

    Wednesday, July 17, 2019 7:41 AM
  • Hi,

    Have you tried reinstalling WAN Miniport driver?

     if you run ipconfig / all you can see the adapter in a corrupt state even if in the control panel the adapter appears to be disconnected.

    I still can't get the key to the problem. could you provide more information such as screenshot?

    Best regards,

    Travis


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    Thursday, July 18, 2019 6:57 AM
    Moderator
  • How would you go about reinstalling these drivers? As soon as it happens again I'll get a screen grab of the ipconfig results

    Olly

    Thursday, July 18, 2019 1:57 PM
  • Hi,

    Please refer to the link below:

    https://answers.microsoft.com/en-us/windows/forum/windows_vista-networking/wan-miniport-pptp/d75cc37e-1dc2-4423-8036-9731049f1670 

    Best regards,

    Travis


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    Friday, July 19, 2019 7:46 AM
    Moderator
  • Hi,

    Just checking in to see if the information provided was helpful.

    Please let us know if you would like further assistance.

    Best Regards,

    Travis


    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Tuesday, July 23, 2019 6:21 AM
    Moderator
  • Hi,

    Was your issue resolved?

    If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.

    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,

    Travis


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    Tuesday, July 30, 2019 2:31 AM
    Moderator