Same result on beta-docker
$ docker run -p 180:80 -d --cap-add NET_BIND_SERVICE nginx
fa6744c99ada895c0e301801d60b2c214b6cfe3fd1f4eb44bf424ba993b95631
docker: Error response from daemon: driver failed programming external connectivity on endpoint adoring_brahmagupta (fc05cfcd198e1f7661930df1c9103a336d0eb8b6d389a0663d93379f0b6a1eb4): Error starting userland proxy: failed to bind port: Unix.Unix_error(Unix.EACCES, “bind”, “”).
same result with 280, i run Yosemite, i’ll try it on Mountain Lion later to see if there is any difference.
I had boot2docker installed before but removed it before installing beta-docker