Clair needs access to the image files. If you run Clair locally, it will directly find them in the filesystem. If you run Clair remotely, this tool will run a small HTTP server to let Clair downloading them. It listens on the port 9279 and allows a single host: Clair's IP address, extracted from the `-endpoint` parameter. The `my-address` parameters defines the IP address of the HTTP server that Clair will use to download the images. With boot2docker, these parameters would be `-endpoint "http://192.168.99.100:6060" -my-address "192.168.99.1"`.
As it runs an HTTP server and not an HTTP**S** one, be sure to **not** expose sensitive data and container images.