title: ubuntu 18.04 server ufw is not blocking even after configuring DOCKER_OPTS="iptables=false"
body: <p>i have been trying all the solutions i found to block incoming traffic to port 5432 but with no success. there is an issue with docker skipping ufw and it has been advised to configure DOCKER_OPTS="iptables=false" in /etc/default/docker, i have done that too but still it's not working. can you please help.</p>