You can add, modify, or delete ports in all predefined services except ICMP_any, UDP_any, TCP_any, and OTHER.

To modify the ports of a predefined network service:

1. Go to Policies > Access Control > Firewall > Network Services.

2. Find the predefined network service you want to change and click the Edit icon.

   

3. You can change any of the TCP Source Ports, TCP Destination Ports, UDP Source Ports, or UDP Destination Ports.
4. Click Save and activate the change.