What to do if win10 cannot connect to the Internet after installing docker

In recent years, with the development of container technology, Docker has become one of the most popular containerization platforms. However, installing and configuring Docker is not always an easy task. In this article, we will discuss the problem you may encounter when you cannot connect to the Internet after installing Docker on your Windows 10 system, and how to solve the problem.

First, let us review the basic concepts of Docker. Docker is a containerization platform that allows you to run multiple independent applications on the same host. Each application runs in its own container, which is isolated from each other. This form of isolation not only improves the security of your applications, it also makes them more portable and scalable.

Installing Docker on a Windows 10 system is relatively simple. All you need to do is download and run the Docker installation package for Windows, and then follow the step-by-step instructions of the installation wizard. Once installed, you can access Docker through command line tools or Docker Desktop. However, some users find that they cannot connect to the external network after installing Docker, which affects their Docker experience.

Before we delve into how to solve this problem, we need to understand Docker's network architecture on Windows. Docker is essentially a Linux platform application, and the network connection methods of Windows systems and Linux are different. Therefore, the Docker installer must use a Hyper-V virtual machine to simulate a Linux network environment. This virtual machine is called MobyLinuxVM.

When you run Docker containers on Windows, Docker connects each container to a virtual network adapter on MobyLinuxVM. This way, the container can access the local network and the Internet through MobyLinuxVM. But sometimes, due to some reasons, MobyLinuxVM cannot connect to the Internet properly, resulting in the container being unable to access the Internet. That's why we can't get internet connection in Docker container.

So, what would cause MobyLinuxVM to be unable to access the Internet? The following are possible reasons:

1. Physical network connection problem
2. A third-party firewall or anti-virus software blocks the network connection of MobyLinuxVM
3. Docker network configuration error
4. The system proxy settings are incorrect

If you find that you cannot access the Internet, you can try the following steps to diagnose and resolve the problem:

1. Check the physical network connection. Make sure the computer is connected to the Internet and the network connection is stable.
2. Disable third-party firewall or anti-virus software. Some firewalls and anti-virus software may block MobyLinuxVM's network connection. To resolve this issue, you can try temporarily disabling these software.
3. Check Docker network configuration. In Docker, all containers are connected to a virtual bridge named docker0. If the docker0 bridge is not set up correctly, it will result in an inability to connect to the Internet. You can view the .docker0 bridge configuration through the following command:

docker network inspect bridge

If you see the following error message, it means there is a problem with the docker0 bridge configuration:

"NetworkSettings": {
    "Bridge": "",
    ....
}

How to solve this problem Run the following command:

docker network create bridge --subnet=172.18.0.0/16

4. Check whether the system proxy settings are correct. If your computer uses a proxy server to access the Internet, you need to check whether the proxy server settings are correct. You can view the current proxy settings with the following command:

netsh winhttp show proxy

If there is a problem with the proxy settings, you can fix it with the following command:

netsh winhttp reset proxy

5. Finally, if all the above methods work If the problem cannot be solved, you can try restarting the computer or reinstalling Docker.

In short, Docker is a very powerful containerization platform that can help you manage and run a variety of different applications. However, when you install and use Docker on your Windows 10 system, you may encounter some problems. If you find that your Docker container cannot connect to the Internet, you can try to solve the problem by checking the physical network connection, disabling third-party firewalls, checking the Docker network configuration, setting the correct system proxy, or restarting the computer.

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