Most of the world, including many of us, uses IPv4 technology. However, the Internet is running out of IPv4 addresses due to all available IPv4 addresses being occupied. As more people heavily use the internet and networks, we transition to IPv6 (Internet Protocol Version 6). IPv6 provides an unimaginably large number of addresses—2 to the power of 128, or 2^128 (340 undecillion)—ensuring a nearly infinite supply. Understanding the shortage of IPv4 addresses makes it easier to understand what Teredo Tunneling is. IPv4 is still widely used. To put it simply, everyone used to speak one language, but now there are two languages. A system speaking the IPv4 language will be understood by others using that language but not by those using IPv6. As the internet relies on interconnected and communicating networks, we need a way to translate between IPv4 and IPv6 and vice versa. This is the role of Teredo Tunneling: it acts as an interpreter between the two IP languages.
Microsoft’s Teredo Tunneling Adapter Driver
Let’s look at how to install the Teredo Tunneling Adapter on Windows 7, a driver that comes built into the operating system. If you cannot find the Teredo Adapter under Network Adapters or in the list of Legacy drivers, try the following steps that have helped many users: If the method above is inefficient, follow these steps to check Teredo’s state and enable it if necessary:
Resolving the Teredo Tunnel Error with a Yellow Exclamation Mark:
How to Fix Issues with the Teredo Adapter on Windows 10
As the Teredo Adapter is considered a legacy component, Microsoft has removed it starting with Windows 10 Build 1803. If you are experiencing issues with the Teredo Adapter on Windows 10 and have a build newer than 1803, here are alternative solutions: If the problem persists, make sure Windows Firewall is active, then follow these steps: If these steps are unhelpful, consider using the Group Policy Editor to change a potentially problematic port: Note: Sometimes, after installing the Microsoft Tunneling Adapter, you might encounter Error Code 10.
