How to EXPOSE Port on running container

ebuildy (eBuildy) October 10, 2016, 9:10pm 12

You cannot with pure Docker, but you could run a TCP proxy:

docker run -ti --rm --net host bobrik/socat TCP4-LISTEN:9300 TCP4:172.17.0.3:9300

Will “open” port 9300 of container 172.17.0.3.

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