How to assign static IPv6 address to RRAS VPN client

ns.88.ns 11 Reputation points
2020-09-16T16:25:45.547+00:00

Hi, Community.

How to assign static IPv6 address to MS Windows RRAS VPN client?

There is a Windows Server 2019 instance with RRAS role configured. RAS/VPN server is configured well - clients can connect. IPv6 prefix for RRAS is fd8f::

Then I would like to assign static IPv6 address to a VPN client. I navigated to user's account -> dial-in -> assign static IP address. There I enabled IPv6 and specified prefix as fd8e:: and interface ID as ::10. Then I pressed "Apply" - no any errors arrised. When the user reconnected - it got a IPv6 address dynamically assigned by RRAS from its IPv6 prefix, however expected IPv6 address should be fd8e::10

It looks as if RRAS accepts static IPv4 address configuration (it works perfect) but fully ignores static IPv6 address configuration.

Could anybody clarify it?

Thank you in advance.

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Windows Server Infrastructure
Windows Server Infrastructure
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Infrastructure: A Microsoft solution area focused on providing organizations with a cloud solution that supports their real-world needs and meets evolving regulatory requirements.
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  1. Sunny Qi 10,921 Reputation points Microsoft Vendor
    2020-09-17T03:41:11.233+00:00

    Hi,

    Thanks for posting in Q&A platform.

    I did a lab per your description in my environment and here are results for your reference.

    Scenario 1: the IPv6 prefix assignment was set "fd8e::" on VPN server

    User account settings

    25345-image-1.jpg

    VPN server settings

    25424-image-2.jpg
    25425-image-3.jpg

    VPN client side

    25426-image-4.jpg

    Scenario 2: the IPv6 prefix assignment was set "fd8f::" on VPN server

    User account settings

    25441-image-1.jpg

    VPN server settings

    25405-image-2.jpg
    25406-image-5.jpg

    VPN client side

    25407-image-6.jpg

    Best Regards,
    Sunny

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  2. ns.88.ns 11 Reputation points
    2020-09-17T06:36:05.597+00:00

    Hi, SunnyQi

    And what we can see from your comment? How your comment can help me? Were you able to configure a static IPv6 address for VPN client in your tests or not?

    From your screenshots, we all can see that only IPv6 prefix is changed and IPv6 address is still auto-cnfigured. You even selected it by RED border. My question (as you can see from description) is:

    How to assign static IPv6 address to RRAS VPN client

    For example, I would like to assign IPv6 address fd8e::10 to a VPN client. How to do it?

    Thank you so much in advance for being more attentive in future.

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  3. Sunny Qi 10,921 Reputation points Microsoft Vendor
    2020-09-17T09:08:11.333+00:00

    Hi,

    Thanks for your update and sorry for didn't clarify my comment clearly.

    Per my lab result as above screenshots, the prefix and interface ID set in Dial-in tab of user account didn't take effect for VPN client. And only the prefix set in VPN server can take effect for VPN client.

    Although we set prefix and interface ID in user account, the VPN client only obtained prefix as per settings on VPN server and cannot obtain expected prefix and interface ID which set in user account. It seems that your conclusion "It looks as if RRAS accepts static IPv4 address configuration (it works perfect) but fully ignores static IPv6 address configuration." was correct!

    I also did some research from my side and it seem that there is no official document regarding of how to assign static IPv6 address to RRAS VPN client.

    Thank you for your understanding.

    Best Regards,
    Sunny

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  4. ns.88.ns 11 Reputation points
    2020-10-27T22:14:48.673+00:00

    Hi, Amit.

    As you have provided me the link to this discussion, I post this update as proof that this discussion was initiated by me. You didn't read this page at all but if you will spend just 5 minutes reading it - you will find that there are no useful answers.

    SunnyQi-MSFT just confirmed that functionality doesn't work in Microsoft OS.

    Best regards.

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