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Internal Port End: When selecting a service, the port number will
automatically be displayed. You can modify it if necessary.
After finishing setting, click Save/Apply to save and apply the settings.
Step 5
4.2.4.2
Port Triggering
Some applications need some ports to be opened in the firewall for the remote
access. When an application initializes a TCP/UDP to connect to a remote user,
port triggering dynamically opens the open ports of the firewall.
Choose Advanced Settings > NAT > Port Triggering, and the following page
appears.
In this page, you may add or remove an entry of port triggering.
Click the Add button to display the following page.
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