[justinclift]

Ouch. That probably means there's a metric shit tonne of VMs running Docker with open ports in their data centres.

Saying that because (by default) Docker screws with firewall rules on the VM when it starts up, to allow other hosts to communicate with the containers.

In other hosting environments, the workaround is to apply firewall rules to your VMs using the hosting infrastructure capabilities. eg separate to the iptables (etc) rules on each host