How to add service with firewall-cmd

First, we like to add an HTTP service to the firewall, we could use below snippet:

firewall-cmd --zone=public --add-service=http

Also, we like to add an HTTPS service to the firewall, just like below:

firewall-cmd --zone=public --add-service=https

Then we need to apply above setting in the firewall, use below snippet:

firewall-cmd --reload

Finally, confirm that port or service was opened successfully:

firewall-cmd --list-all

Easy to use