title: Set 'host' as default network for Docker
body: <p>Docker can build containers just fine up until I connect my Cisco VPN. After that, containers are unable to connect to the outside internet. It's more than a DNS problem, it simply can't route to anything outside of Docker's own network. Now, I can get around this by running containers with <code>--net=host</code> But the problem is with building containers with dockerfiles. I see no way to set the host there. Is there somewhere else I can configure docker to simply always use 'host' as the default network?</p>