Firewall and Docker

[UnawareBlaire]

I recently transformed my old PC into a home server running Arch Linux. I wanted to put firewalld on it for security but doing so causes my Docker containers to become unable to communicate with each other.

 

According to the documentation, Docker should be able to run under a "docker" zone in firewalld as long as iptables is set to true, but the zone never populated with the docker network interface and manually adding it did not work. Am I missing something?

[whispous]

In normal practise, your firewall is on your router, not your server. Is there a reason you're not using your router to accomplish what you want your firewall to do?

[UnawareBlaire]

That makes sense. I wasn't sure if having a firewall on the server was appropriate or not. I do have a firewall at the router level thankfully.