NetComm HSPA 7.2 MBPS WI-FI ROUTER 3G9W - Manual (Page 48)

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7.2.2 Port Triggering
Some applications require specific ports in the Router’s firewall to be open for access by remote parties.
Port Triggering opens up the ‘Open Ports’ in the firewall when an application on the LAN initiates a TCP/UDP
connection to a remote party using the ‘Triggering Ports’. The Router allows the remote party from the WAN
side to establish new connections back to the application on the LAN side using the ‘Open Ports’. A maximum
32 entries can be configured.
To add a Trigger Port, simply click the Add button. The following will be displayed.