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Setting up L2TP VPN breaks PPP on SBS2011? RRS feed

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    I have been struggling with my SBS2011 for a while, but I have it running now and can access it from the outside through VPN using a PPP connection. The server is not the DHCP server, that is done on the firewall.

    PPP seems to work fine now (thanks, Niels), but I can't use it if I need to connect to server via a hotspot on my iPhone, and I cannot use it to VPN from my iPad either (Apple disabled PPP a while ago). So I tried to set up an L2TP connection. My problem is that when I do so, I can't connect to the server anymore, not even through PPP. To get access back, I have to basically remove everything that I did to establish L2TP. And I don't understand why that is. Isn't L2TP an alternative to PPP (with additional security)? Why would setting up L2TP break PPP? And I tried it several times. Same result every time. At some point something flashed up about a security certificate being expired. Are there security certificates involved, and which one would that be for L2TP?

    Monday, December 23, 2019 7:03 PM

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    HI
    there is a document for your reference
    SBS 2011 Essentials – Configuring VPN access
    https://blog.lan-tech.ca/2012/01/28/sbs-2011-essentials-configuring-vpn-access/

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    Best Regards
    Andy YOU
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    Tuesday, December 24, 2019 2:52 PM
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    Thanks. That is precisely the document that I used to set up the L2TP connection. Unfortunately it does not mention any certificates (I think I saw that error message pop up on the client), and it does not mention why an L2TP connection would break an existing and working PPP connection. Are there any settings that make it impossible to use a PPP connection once an L2TP connection is defined?


    Thursday, December 26, 2019 7:01 PM
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    HI
    thanks for your reply.
    we can refer below document first .
    VPN Part 1- PPTP L2TP IPSEC - MS Windows 2012 Server / Windows 8
    https://www.youtube.com/watch?v=WuLSAfwAldg

    VPN Part 2 - L2TP/IPSEC with certificates - MS Windows 2012 Server / Windows 8
    https://www.youtube.com/watch?v=xz-g-7TPnos

    Windows 2011 SBS Part 6
    https://www.youtube.com/watch?v=YbdqJVglu6A

    Please Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. 

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



    Tuesday, December 31, 2019 9:53 AM
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    HI
    Is there any progress on your question?

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    Andy YOU
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    Monday, January 6, 2020 6:40 AM
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    HI
    Is there anything to help you?

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    Andy YOU
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    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, January 8, 2020 2:55 PM