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Admins running docker and using ufw to manage iptables, docker messes directly with the rules. There's a fix at the end of this post. #admin
http://blog.viktorpetersson.com/post/101707677489/the-dangers-of-ufw-docker
Better article on this if you are running 16.04.
http://blog.samcater.com/how-to-set-docker-1-12-to-not-interfere-with-iptables-firewalld/
