Ubuntu UFW and Docker security

There is a security issue when running Ubuntu 16/18, Docker and UFW together. The standard Docker settings involve direct controlling of iptables. If you specify any UFW rules, they won’t be applied to docker.

Configure the UFW firewall:

–code–

Run docker using open port

–code2-

Try connecting:

Here we go!

Let’s solve the problem

Method 1: don’t expose ports, resort to –net=host with containers

Method 2: change the Docker response by creating or correcting the /etc/docker/daemon.json file.

–code3–

Try connecting:

Not connected. Problem solved.