So you want to connect to the Docker instance on Photon OS remotly from another Docker client? In this guide I will walk you through a few short steps to configure Photon OS to enable the remote docker API. NOTE: This is not considered the secure method. If you want to use encryption and secure connections I will have a follow up post on that soon.
systemctl stop docker
Press i on the keyboard then enter the following, when done press the ESC key then hold Shift and press the Z key twice
DOCKER_OPTS="-H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock"
iptables -A INPUT -p tcp --dport 2375 -j ACCEPT
systemctl start docker