windows 7 - Tunnel adapters on ipconfig?

17
2014-04
  • IMB

    Hello I recently noticed unusual information in my IPCONFIG. Usually I only see Ethernet adapter Local Area Connection, but now I see Tunnel adapter isatap... and Tunnel adapter Teredo... I was wondering if this is something I should be worried about, if yes how do I remove them?

    enter image description here

  • Answers
  • grawity

    Both Teredo and ISATAP are mechanisms for IPv6 connectivity on IPv4-only networks. Since Windows 7 comes with IPv6 enabled, I wouldn't be surprised if they were always on, just didn't appear in ipconfig for some strange reason. (On one of my test VMs, the ISATAP adapter shows up, but not Teredo. Also strange.)


    ISATAP is practically useless on a personal network, so it can be disabled permanently:

    netsh interface ipv6 isatap set state disabled
    

    On the other hand, Teredo works practically anywhere with the help of Microsoft's Teredo server – your screenshot has a global IPv6 address, too. You can leave it on, since Windows will always prefer native IPv4 over Teredo-tunneled (and possibly slower) IPv6 connections; but if you really want to get rid of it, repeat the above command with teredo set state disabled.


  • Related Question

    windows 7 - What is the Teredo Tunneling Pseudo-Interface?
  • Svish

    I am running Windows 7 Ultimate, and when I do ipconfig /all in the command prompt I get, in addition to the Ethernet adapter Local Area Connection that I expected, something called Tunnel adapter Teredo Tunneling Pseudo-Interface. What is this? What can I use it for?


  • Related Answers
  • dave

    Teredo is a protocol that allows computers behind a NAT firewall (most home computers are) and without a native IPv6 connection to access remote IPv6 resuorces. The idea is that home users can start accessing IPv6 web services before their local connection supports the protocol, making the transition from IPv4 easier.

  • Nifle

    Found this after a quick google.

    According to wikipedia, http://en.wikipedia.org/wiki/IPv6, it's some sort of a new TCP/IP protocol .


    To make a long story short, it means you have IPv6 installed as part of your networking components. Check the following;

    Go to Control Panel and double click Network Connections. Right click on the icon for your Local Area Connection and select Properties from the menu.

    On the General page of the properties sheet there's a box which should contain an entry for Microsoft TCP/IP version 6.

    I won't bore you with the details but the bottom line is that most people have no need at this time for IPv6. That said, it won't lead to problems if you leave it installed on your computer. That said, uninstalling IPv6 won't cause you to lose your internet connection. The entry you see for Internet Protocol (TCP/IP) is the important one.

    If you're curious about IPv6, here's a web site with more information.

    IPv6 for Microsoft Windows: Frequently Asked Questions http://www.microsoft.com/technet/network/ipv6/ipv6faq.mspx

  • Tom Wijsman

    If you'd like to disable this in Windows 7:

    1. Make sure you are an administrator or have access to an administrator account.
    2. Right click on Computer, choose "Manage."
    3. In the left-hand menu, under System Tools, left-click on "Device Manager."
    4. Now, right-click on "Device Manager."
    5. Hover over "View >" and click "Show Hidden Devices" in the menu that pops up.
    6. In the center pane, look for a group called "Network Adapters" and expand it by double-clicking on it.
    7. You will see a list of all of your adapters, including the one in disabled.

    I haven't had any issues after disabling these yet. If I become concerned about accessing resources on an IPv6 network, I will re-enable these.