Docker and IPtables Firewall Merger

The problem: Modifying firewall rules on a host that runs Docker or Rancher (cattle) causes the docker-bridges and rancher NAT rules to be blown away, causing all your containers networking to break.

The solution: Modify /etc/sysconfig/iptables as normal and instead of running iptables-restore /etc/sysconfig/iptables run as root:

I’d appreciate some constructive feedback! … /DockerFirewallMerge