Docker - ufw rules ignored

01 Jan 2022

I recently learned that docker will ignore ufw (uncomplicated firewall) rules by default. This means that it will still expose ports that are blocked by ufw.

The fix involved adding this to /etc/docker/daemon.json:

{
    "iptables": false,
    "ip6tables": false
}

Then I restarted the docker daemon with sudo systemctl restart docker.

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