Windows 11 can not work properly via PPTP/L2TP VPN connection

duo jin 1 Reputation point
2022-06-03T05:03:13.007+00:00

Hi,

I got a problem that my windows 11 could not work properly when connected to my hardware VPN router.

Windows 11 could not access internal network's service via PPTP or L2TP, I tried sth as followed:

  • trace route by "tracert" command worked fine, fisrt destination is the virtual IP assigned to win11, next and the final destination is the target server I traced (2 jump)
  • I setup a UDP service on my server behind VPN, win11 can visit this service by udp client , seems UDP protocol worked fine.
  • I can ping my internal server , ICMP seems worked fine
  • I can not visit any TCP based service, like FTP, remote desktop, HTTP portal.
  • windows 11 can temporary visit TCP service behind VPN if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again.

With same connection account I tried Win 10, Win server 2019, MacOS, all of them worked fine except my win 11 mentioned above.

OS ver: windows11 21H2 22000.708
VPN server: TPLINK TL-R476G

Any solution or suggestion is highly appreciated.

Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
3,556 questions
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10 answers

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  1. Joe 21 Reputation points
    2022-08-14T13:13:51.187+00:00

    ok, after a few hours later, I think I got it!

    Pls try to stop your the service "DellOptimizer"
    After I set it to Starttype "Manual", stopped it and reconnected the L2TP VPN from my client, the problem was solved. RDP and all other services started working again permamently


  2. Rachel Gomez 156 Reputation points
    2022-08-15T04:29:45.89+00:00

    Try this steps to fix -

    1. Update Windows 11
      Open Settings from the Start menu.
      Click the Windows Update tab on the left of Settings.
      Select the Check for updates option.
      The Check for updates option windows 11 vpn not working

    Then download and install any Windows 11 patch updates available to you.

    1. Reinstall WAN miniport network adapters
      First, right-click the Start taskbar button and select Device Manager.
      Double-click the Network adapters category to expand it.
      Right-click WAN Miniport (IP) and select the Uninstall device option.
      The Uninstall device option windows 11 vpn not working
      Select Uninstall on the confirmation prompt.
      The Uninstall option windows 11 vpn not working
      Repeat the previous two steps for the WAN Miniport (PPTP) and WAN Miniport(IPv6) devices.
      Thereafter, click the Action menu. Select the Scan for hardware changes option there to reinstall the adapters.
      Click Power and Restart on the Start menu.
    2. Try a dedicated VPN
      A third-party VPN is oftentimes more stable with a lower error rate. We recommend you try a service that provides the perfect balance when it comes to feature set and server coverage such as Private Internet Access.

    It implements powerful AES-256 encryption, secure ports, and additional security features such as a kill switch and anti-tracking options.

    PIA is amongst the VPNs with the best server coverage, with over 35, 000 servers in over 70 countries around the globe.

    The latest version of this VPN is fully compatible with Windows 11 and it is very easy to configure.

    You just have to set up an account, install the application and then connect to a private server at the press of a button.

    Expert Tip: Some PC issues are hard to tackle, especially when it comes to corrupted repositories or missing Windows files. If you are having troubles fixing an error, your system may be partially broken. We recommend installing Restoro, a tool that will scan your machine and identify what the fault is.
    Click here to download and start repairing.

    Regards,
    Rachel Gomez

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  3. Nof Hasson 1 Reputation point
    2022-07-13T11:49:54.387+00:00

    I also have this issue . After upgrading from windows 10 to windows 11 - when I'm trying to using VPN - I got ERR_ADDRESS_UNREACHABLE in all websites(including public websites)..the strange this is : if I am refreshing the page many times - the website can suddenly works (public & private sites) but only to the specific page -if i'm trying to navigate or click buttons and etc - the ERR_ADDRESS_UNREACHABLE page returns.
When I'm disconnecting the VPN connection - my internet back to normal functionality. (I tried Chrome & Edge & Firefox & Firefox portable - all browsers were with the same behavior ).
I also reset all networks preferences ( windows settings -> network settings -> advanced -> reset my networks) -multiple times & flush my DNS cache & ipconfig /renew + release commands in the cmd & clear browser data & DNS/proxy cache and installed windows updates & Dell updates (My laptop is Dell latitude 5420 with windows 11)
I replaced my internet provider & replaced my router as well -

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  4. Nof Hasson 1 Reputation point
    2022-07-13T11:57:06.517+00:00

    I also have this issue . After upgrading from windows 10 to windows 11 - when I'm trying to using VPN - I got ERR_ADDRESS_UNREACHABLE in all websites(including public websites)..the strange this is : if I am refreshing the page many times - the website can suddenly works (public & private sites) but only to the specific page -if I'm trying to navigate or click buttons and etc. - the ERR_ADDRESS_UNREACHABLE page returns.
    When I'm disconnecting the VPN connection - my internet back to normal functionality. (I tried Chrome & Edge & Firefox & Firefox portable - all browsers were with the same behavior ).
    I also reset all networks preferences ( windows settings -> network settings -> advanced -> reset my networks) -multiple times & flush my DNS cache & ipconfig /renew + release commands in the CMD & clear browser data & DNS/proxy cache and installed windows updates & Dell updates (My laptop is Dell latitude 5420 with windows 11)
    I replaced my internet provider & replaced my router as well - I upgraded to fiber optics but it didn't changed anything.
    The strangest thing - that if I open an access point (hot-spot)) from my mobile device (Oneplus 6) and connect to it, and then connect to a VPN - everything works great! No errors or messages about ERR_ADDRESS_UNREACHABLE - so these are not VPN configuration issues or browser issues. I tried using the internet of my neighbors that they use a completely different provider and also the problem repeated itself.
    I'm taking on l2tp/IPsec with pre-shared key VPN. please help me to solve this strange issue. I don't want to rollback to windows 10. thanks a lot!!

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  5. Nof Hasson 1 Reputation point
    2022-07-13T11:59:20.937+00:00

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