I have docker for windows running windows container. Machine is connected to corporate network via Cisco AnyConnect VPN. We have been having this issue for sometime with no solutions. To explain the problem here is an example. Go to docker image here https://hub.docker.com/_/microsoft-dotnet-samples and run the below commands in command prompt / powershell in sequence
docker pull mcr.microsoft.com/dotnet/samples:aspnetapp
docker run -it --rm -p 8000:80 --name aspnetcore_sample mcr.microsoft.com/dotnet/samples:aspnetapp
replace port 8000 with something else if there is an error in lines of hns file being used. Go to browser and do http://localhost:8000 assuming its running on port 8000. It doesn't connect for me. Instead of localhost i also tried below command to find the ipaddress of the container running the image and then replace localhost with that ip address but with same response unable to connect.
docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name_or_id
here is an screenshot of the network adapter docker sets up by default
here is another screenshot of the nat network adapter
