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Konstantinos Tsoukalas

Konstantinos is the founder and administrator of Since 1995 he works and provides IT support as a computer and network expert to individuals and large companies. He is specialized in solving problems related to Windows or other Microsoft products (Windows Server, Office, Microsoft 365, etc.).


  1. Mohammad faisal
    September 15, 2023 @ 5:19 pm

    I don't use IPV6, is it ok to have type ; disabled?


    • lakonst
      September 15, 2023 @ 6:36 pm



  2. mark shawley
    February 3, 2022 @ 11:46 pm

    wonderful, except that teredo tunneling adapter does not appear in the list of available downloads.


  3. Randy
    July 3, 2018 @ 4:07 am

    Nice guild, however I still cannot get the tunnel to populate in the device manger list. This the output from the show state command:

    Microsoft Windows [Version 10.0.17134.112]
    (c) 2018 Microsoft Corporation. All rights reserved.

    C:\WINDOWS\system32>netsh interface Teredo show state
    Teredo Parameters
    Type : client
    Server Name :
    Client Refresh Interval : 60 seconds
    Client Port : 34567
    State : offline
    Error : failed to resolve server name

    Yesterday the tunnel was there and working fine, this morning the program that uses it quit working and the tunnel is no longer present in the device manager. So weird and random. This happened before and I thought I had a virus so I wiped the system and reinstalled windows and the problem corrected. This time I am positive it is not a virus and I do not want to wipe the system just to install the teredo tunnel. Any ideas as to why this would happen?


    • Dawn
      January 10, 2019 @ 3:12 am

      This is exactly what I'm getting. Did you ever get a resolution? I'm losing my mind trying to fix this!


  4. Saxe
    February 8, 2018 @ 7:57 pm

    Very good and thank for this guide


  5. Yuji
    January 23, 2018 @ 7:03 am

    I can ping myself, but can't ping other networks. It always goes like this. I actually have no access to any ipv6 sites. Can you help?

    Pinging [2607:f8b0:400a:809::200e] with 32 bytes of data:

    Requested timed out.
    Requested timed out.
    Requested timed out.
    Requested timed out.

    Ping statistics for 2607:f8b0:400a:809::200e:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss)


  6. Mark
    July 16, 2017 @ 11:04 am

    the command prompt told me that the state of the teredo interface was offline, why would this be?


    • lakonst
      July 17, 2017 @ 8:44 am

      @Mark: In command prompt type: netsh interface teredo set state type=enterpriseclient
      Also, make sure that in services the "Startup type" of "IP Helper service" is set to "Automatic" and the service is started. (or restart your system)


  7. param
    March 8, 2017 @ 7:55 am

    thanks a lot for the articel.


  8. kath
    July 3, 2016 @ 6:15 pm

    Thank you first adapter loaded fine now saying need to install tunneling adapter #2
    searching Windows update.


  9. Lars
    April 26, 2016 @ 6:55 pm

    Doesn't Work, still the same problem


    • lakonst
      April 26, 2016 @ 7:48 pm

      @If you don't TCP/IP v6 , then ignore the problem.


  10. Stephen
    April 4, 2016 @ 3:52 am

    Thank you.


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