Error 'Teredo is Unable to Qualify' has been fixed

Error ‘Teredo is Unable to Qualify’ has been fixed

This article mainly focuses on the “Xbox Teredo cannot qualify” error, which is an annoying problem for multiplayer gamers. To solve the problem, here are Techquack’s 6 solutions with detailed steps.

The problem with the Xbox One, like the Xbox One app for Windows 10, causes many problems. The problem is Teredo, a network adapter protocol that facilitates connections like those used in NAT configurations. When this protocol is disabled or hampered, either manually or by software, it can have these harmful effects on the system.

The first thing you need to do is make sure that your Internet connection is working properly. Once you have verified that this is the case and that the problem persists, you can move on to other solutions.

Teredo is a network adapter protocol. It allows users to have an IPv6 connection when they are on an IPv4 Internet without a native IPv6 network connection. But sometimes Xbox Teredo may not meet the requirements, preventing you from chatting with friends online or playing live multiplayer games.

According to user reports, when checking Xbox network settings, the NAT type here indicates that Teredo cannot qualify, and sometimes the connection to the server is blocked.

This bug can be frustrating for gamers, as it can prevent users from playing multiplayer games. You don’t need to worry if you encounter this problem. See the content below to find out how you can easily solve this problem.

 

What is the cause of the “Teredo cannot be qualified” error?

What is the cause of the "Teredo cannot be qualified" error?

If users are seeing this error message, it’s probably because they can’t connect to Xbox Live and encountered Xbox Line network settings while troubleshooting. There can be several reasons for this problem, most of which are network-related.

Poor Internet connection: This cause is at the top of the list, as it is probably the most common cause encountered by users. Making sure the Internet is working properly is the first step in troubleshooting.

Broken Teredo adapter: To implement the Teredo protocol, the engine uses a Teredo adapter, which is installed by default and hidden on your system. If this adapter is damaged or has problems, you will have problems.

IP Helper Service: The Teredo engine also uses the IP Helper Service to change network settings. If this service is not activated or manually configured, you will encounter several problems.

Teredo Server Name: A virtual server is also installed on your computer to run Teredo. If this server name is set to a different name than the default, you may encounter connection problems.

Teredo is disabled in the registry: If Teredo is disabled in your registry, you will not be able to connect and you will get an error message when your Xbox tries to connect to the Live service.

UPnPv2: For the Teredo protocol to work properly, your router must also support UPnPv2. If it is not supported or disabled, the connection process will not complete.

Faulty hosts file: Every version of Windows has a hosts file that is used to associate hostnames with IP addresses. If the entries in the hosts’ file are incorrect, there will be problems establishing a Teredo protocol connection.

The router does not support Teredo: If your router does not support Teredo, or if support is disabled, this error message may appear.

Outdated Windows: Microsoft engineers have also officially identified the problem and released possible updates to fix it. If you have an outdated version of Windows, this may be the cause of the error message.

VPN: VPNs or other applications that change the network further reconfigure your network. This causes a conflict with the Teredo mechanism.

Make sure that you are logged in as an administrator on your computer before running solutions. Also, have your Xbox credentials handy, as you will need to enter them often.

Note: Make sure you have updated Windows and all Xbox games to the latest version before moving on to other solutions.

 

How do I fix the “Teredo cannot qualify” error?

How do I fix the "Teredo cannot qualify" error?

Here are some solutions that have helped other users solve the “Teredo can’t qualify” problem. You don’t need to try them all, just go through the list until the problem is solved.

  • Check your internet connection
  • Uninstall and reinstall the Teredo adapter
  • Make sure that the IP Helper startup type is set to automatic
  • Set the Teredo server name to the default
  • Delete unnecessary entries
  • Check if your router is configured to allow Teredo connections

Check your Internet connection

Before troubleshooting, make sure that your Internet is working properly.
Since a non-functioning Internet connection can cause a problem, Teredo cannot take advantage of this help.

Proceed as follows:

1.) On your computer, launch the Xbox app.
2.) Click the Settings -> Network icon. Then check if the Internet connection is set to “Connected”.
3.) If the network status is “Connected”, go to solution 2 below for further troubleshooting.

Remove and reinstall the Teredo adapter

It is also possible that the current Teredo adapter is damaged or in conflict with your system and is the source of the problem. We can remove the Teredo adapter and reinstall it to see if it works. Here’s how:

Here are the steps to uninstall the Teredo adapter

  1. Press the Windows logo key on your keyboard and type cmd. Then right-click on the command prompt and select Run as Administrator.
  2. Click Yes to confirm.
  3. Enter the following command and press the Enter key:
    netsh interface Teredo set state disable
  4. Close the order request window.
  5. On your keyboard, press the Windows logo key and the R key at the same time. Then type devmgmt.msc and press the Enter key.
  6. Click View -> Show Hidden Devices.
  7. Double-click Network Adapters.
  8. Right-click the adapter containing Teredo, and then click Remove.
  9. Reboot your computer.

Below to the right are the steps to reinstall the Teredo adapter.

  1. On your keyboard, press the Windows logo key and type cmd. Then right-click on the command prompt and select Run as Administrator.
  2. Click Yes to confirm.
  3. Type the following command and press Enter.
  4. Check to see if the “Teredo cannot qualify” problem has been resolved. If so, perfect! But if that doesn’t solve the problem, don’t worry, there are several other solutions you can try.

Check to see if the IP Helper automatic startup type is set

For Teredo to work correctly, we have to make sure that the IP Helper service startup type is set to automatic. Here’s how:

  1. On your keyboard, press the Windows logo key and R at the same time, then type services.msc and press Enter.
  2. Find IP Helper and double-click IP Helper.
  3. Under Startup Type, make sure you select Automatic from the drop-down menu and click OK.
  4. Confirm that the “Teredo cannot qualify” issue has been resolved and you can now use party chat or play multiplayer games on Xbox Live.

Set the Teredo server name to its default value

An incorrect value for the Teredo server name can also cause Teredo to fail to obtain an IP address, resulting in the “Teredo cannot qualify” problem. Here are the steps for setting the server name to the default:

  1. On your keyboard, press the Windows logo key and type cmd. Then right-click on the command prompt and select Run as administrator.
  2. Click Yes to confirm.
  3. Enter the following command and press Enter.
    netsh interface Teredo set state servername=default
  4. Verify that the “Teredo cannot qualify” error is resolved.

Remove unnecessary entries

An error sometimes occurs when unnecessary entries are added to the host file.

To check the host file and delete entries if they are found :

1.) On your keyboard, press the Windows logo key and type cmd. Then right-click on the order prompt and click Run as administrator.
2.) Click Yes to confirm.
3.) Enter the following command and press Enter.
notepad.exe c:WINDOWSystem32driversetches
4.) The notepad window opens immediately. In the notebook window, press Ctrl and F at the same time, then type win10.ipv6.microsoft.com and click Find Next.
5.) If an entry is found, delete the entry and save the file.
6.) Check the X checkbox and see if the “Teredo can`t qualify” problem has been resolved. If the problem persists, go-to solution 6 below.

Check whether your router is configured to enable Teredo connection.

Some routers block Teredo connectivity as soon as they detect the presence of an IPv6 connection. So make sure your router has the latest firmware, and contact your router manufacturer for assistance if necessary. Next, be sure to check to see if the Xbox can be used for multiplayer games on Xbox Live.

 

Frequently Asked Questions

Select Settings -> Games, then select Xbox Networking. Select Repair. Windows will attempt to detect and fix any known problems with Teredo. Note: You may need to reboot your computer for the changes to take effect after clicking Repair.

When it says Teredo can't qualify, it means that your computer can't get Teredo's IP address. Teredo is a network protocol used to create secure communications between clients and servers and to facilitate connections between devices behind routers that use Network Address Translation (NAT).

  1. Check your Internet connection.
  2. Uninstall and reinstall the Teredo adapter.
  3. Make sure that the IP Helper startup type is set to automatic.
  4. Set the Teredo server name to the default.
  5. Delete unnecessary entries.
  6. Check if your router is configured to allow Teredo connections.

In computer networks, Teredo is a bridge technology that provides full IPv6 connectivity to IPv6 compatible hosts that are on the IPv4 Internet but do not have their own IPv6 network connection. Teredo is a temporary measure. In the long term, all IPv6 hosts should use their own IPv6 connection.

2 Comments

  1. Kay Ge Reply

    Step 3 in how to reinstall Teredo doesn’t list the command you’re supposed to type in… or I’m blind. Tough call.

Leave a Reply

Your email address will not be published. Required fields are marked *