You can use TecAdmin's tutorial to learn how to configure FirewallD to open ports for a particular network.

How to Open Port for a Specific Network in FirewallD

In FirewallD, the `--source` option allows you to specify a network or an IP address as the source for applying the rules. It is used to specify the network or IP address that is allowed to access the port or service that is being opened. 

How to Open Port for a Specific Network in FirewallD – TecAdmin