I do not use iptables.
Here is my solution depends on your preferences (UFW or FIREWALLD).
Firewall Configuration Guide
UFW (Uncomplicated Firewall)
If UFW is active, it’s necessary to allow the required ports:
sudo ufw allow 1716:1764/udp
FIREWALLD
Allowing Ports for TCP
To allow TCP ports:
sudo firewall-cmd --zone=public --add-port=1714-1764/tcp --permanent
Allowing Ports for UDP
To allow UDP ports:
sudo firewall-cmd --zone=public --add-port=1714-1764/udp --permanent
Reload Firewalld
To apply the changes, reload the firewalld:
sudo firewall-cmd --reload