### If behind a VPN (AnyConnect) do the following:

```bash
boot2docker down
vboxmanage modifyvm "boot2docker-vm" --natpf1 "docker,tcp,127.0.0.1,2376,,2376"
boot2docker up
export DOCKER_HOST=tcp://127.0.0.1:2376
```

### To expose a port from boot2docker to host (osx):

Make sure that you use `-p internalport:externalport` when using `docker run`.
Before starting boot2docker, do `VBoxManage modifyvm "boot2docker-vm" --natpf1 "tcp-port8000,tcp,,8000,,8000";`.
_Replace all instances of 8000 with the externalport._

### Using insecure registries

```bash
boot2docker init
boot2docker up
boot2docker ssh "echo $'EXTRA_ARGS=\"--insecure-registry <YOUR INSECURE HOST>\"' | sudo tee -a /var/lib/boot2docker/profile && sudo /etc/init.d/docker restart"
```