Expected behavior Docker for Windows has VPN Compatibility Mode Actual behavior I can’t enable VPN Compatibility Mode Information I guess this feature is disabled in Docker for Windows, but do you know when it is going to be enabled? Steps to reproduce the behavior Go to system tray Right click on docker Click on Settings VPN compatibility mode is disabled. Finding a VPN solution that is right for you can be challenging. There are a lot of options available and many factors you need to consider before making a decision. In this VPNSecure vs VPN Unlimited comparison, we’re going to Docker Windows Vpn Passthrough compare these two. Docker for Windows provides several networking features to make it easier to use. Features VPN Passthrough. Docker for Windows’s networking can work when attached to a VPN. To do this, Docker for Windows intercepts traffic from the containers and injects it into Windows as if it originated from the Docker application. VPN Passthrough 🔗 Docker Desktop for Mac’s networking can work when attached to a VPN. To do this, Docker Desktop for Mac intercepts traffic from the containers and injects it into Mac as if it originated from the Docker application.

Docker Desktop Vpn Passthrough
Docker Desktop Windows Vpn Passthrough

Estimated reading time: 3 minutes

Docker for Windows provides several networking features to make it easier touse.

Features

VPN Passthrough

Docker for Windows’s networking can work when attached to a VPN. To do this,Docker for Windows intercepts traffic from the containers and injects it intoWindows as if it originated from the Docker application.

Port Mapping

When you run a container with the -p argument, for example:

Docker for Windows makes whatever is running on port 80 in the container (inthis case, nginx) available on port 80 of localhost. In this example, thehost and container ports are the same. What if you need to specify a differenthost port? If, for example, you already have something running on port 80 ofyour host machine, you can connect the container to a different port:

Now, connections to localhost:8000 are sent to port 80 in the container. Thesyntax for -p is HOST_PORT:CLIENT_PORT.

HTTP/HTTPS Proxy Support

See Proxies.

Known limitations, use cases, and workarounds

Following is a summary of current limitations on the Docker for Windowsnetworking stack, along with some ideas for workarounds.

There is no docker0 bridge on Windows

Because of the way networking is implemented in Docker for Windows, you cannotsee a docker0 interface on the host. This interface is actually within thevirtual machine.

I cannot ping my containers

Docker for Windows can’t route traffic to Linux containers. However, you canping the Windows containers.

Per-container IP addressing is not possible

The docker (Linux) bridge network is not reachable from the Windows host.However, it works with Windows containers.

Use cases and workarounds

There are two scenarios that the above limitations affect:

I want to connect from a container to a service on the host

The host has a changing IP address (or none if you have no network access). From18.03 onwards our recommendation is to connect to the special DNS namehost.docker.internal, which resolves to the internal IP address used by thehost.This is for development purpose and will not work in a production environment outside of Docker for Windows.

The gateway is also reachable as gateway.docker.internal.

I want to connect to a container from the Windows

Port forwarding works for localhost; --publish, -p, or -P all work.Ports exposed from Linux are forwarded to the host.

Our current recommendation is to publish a port, or to connect from anothercontainer. This is what you need to do even on Linux if the container is on anoverlay network, not a bridge network, as these are not routed.

The command to run the nginx webserver shown in Getting Startedis an example of this.

To clarify the syntax, the following two commands both expose port 80 on thecontainer to port 8000 on the host:

Docker Desktop Vpn Passthrough

To expose all ports, use the -P flag. For example, the following commandstarts a container (in detached mode) and the -P exposes all ports on thecontainer to random ports on the host.

See the run command for more details onpublish options used with docker run.

windows, networking

Estimated reading time: 4 minutes

Docker Desktop provides several networking features to make it easier touse.

Features

VPN Passthrough

Docker Desktop networking can work when attached to a VPN. To do this,Docker Desktop intercepts traffic from the containers and injects it intoWindows as if it originated from the Docker application.

Port Mapping

When you run a container with the -p argument, for example:

Docker Desktop makes whatever is running on port 80 in the container (inthis case, nginx) available on port 80 of localhost. In this example, thehost and container ports are the same. What if you need to specify a differenthost port? If, for example, you already have something running on port 80 ofyour host machine, you can connect the container to a different port:

Now, connections to localhost:8000 are sent to port 80 in the container. Thesyntax for -p is HOST_PORT:CLIENT_PORT.

HTTP/HTTPS Proxy Support

See Proxies.

Known limitations, use cases, and workarounds

Following is a summary of current limitations on the Docker Desktop for Windowsnetworking stack, along with some ideas for workarounds.

There is no docker0 bridge on Windows

Because of the way networking is implemented in Docker Desktop for Windows, you cannotsee a docker0 interface on the host. This interface is actually within thevirtual machine.

I cannot ping my containers

Docker Desktop for Windows can’t route traffic to Linux containers. However, you canping the Windows containers.

Per-container IP addressing is not possible

The docker (Linux) bridge network is not reachable from the Windows host.However, it works with Windows containers.

Use cases and workarounds

There are two scenarios that the above limitations affect:

I want to connect from a container to a service on the host

The host has a changing IP address (or none if you have no network access). We recommend that you connect to the special DNS namehost.docker.internal which resolves to the internal IP address used by thehost. This is for development purpose and will not work in a production environment outside of Docker Desktop for Windows.

You can also reach the gateway using gateway.docker.internal.

If you have installed Python on your machine, use the following instructions as an example to connect from a container to a service on the host:

Run the following command to start a simple HTTP server on port 8000.
python -m http.server 8000
If you have installed Python 2.x, run python -m SimpleHTTPServer 8000.
Now, run a container, install curl, and try to connect to the host using the following commands:

Docker Desktop Windows Vpn Passthrough

I want to connect to a container from Windows

Port forwarding works for localhost; --publish, -p, or -P all work.Ports exposed from Linux are forwarded to the host.

The command to run the nginx webserver shown in Getting Startedis an example of this.

Docker Vpn Passthrough