A lot of times, for small deployments, we might have a set up like so:

• 3 nodes with 1 network interface connected to a local private network.
• 2 nodes with 2 network interfaces, 1 connected to the local private network and 1 connected to the public internet.

It would be nice if we could set up a swarm on the local private network, and allow the nodes with a public interface to publish ports to the public interface for services like webservers.