Configure port forwarding on the system1, as required:

1. The systems in the network 172.24.11.0/24, local port 5423 for accessing system1 will be forwarded to 80
(2) This setting must be permanent

Please see explanation

Explanation:
Use Graphical interface to configure
Use firewall-config to open the Graphical interface in CLI
Adjust the configuration: drop-down menu to permanent
Add a strategy to the public area of the “Port Forwarding”

systemctl restart firewalld.service // Reload the firewall strategy