No Network Interfaces Bound to Firewalld Zone

Using a fresh build of CentOS 7.3, I am attempting to follow the tutorial at

However there are no active zones when I use “sudo firewall-cmd --get-active-zones” as per the tutorial. I believe this is due to no network interface being bound to a zone. Using comand “sudo firewall-cmd --zone=public --list-all public”. I can see that there are no interfaces bound to the public zone (which I presume is what I need). I have used:

  • $ sudo firewall-cmd --permanent --add-service=ssh
  • $ sudo firewall-cmd --permanent --add-service=http
  • $ sudo firewall-cmd --permanent --add-service=https
  • $ sudo firewall-cmd --permanent --add-port=80/tcp
  • $ sudo firewall-cmd --permanent --add-port=443/tcp
  • $ sudo firewall-cmd --reload

But I don’t think any of this is helping without an active zone. My goal is to have ports 80 and 443 show as opened after an external port scan, but they continue to show as closed. Please advise.

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

To assign an interface to a zone, run:

  1. sudo firewall-cmd --zone=public --change-interface=eth0

Here is another useful command:

  1. sudo firewall-cmd --get-zone-of-interface=eth0

It allows you to find which zone to which a particular interface is bound.

I just build a Centos 7.5 system and my interfaces weren’t assigned to any zone. I added source ip ranges to trusted and created a few other zones with source ip ranges. All the zones plus the rules in the public zone are working.

I don’t know if it’s a bug or a feature, but not having to force an interface to a zone seems to be beneficial.