How Port Forwarding Differs from Port Triggering
The following points summarize the differences between port forwarding and port triggering:
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Port triggering can be used by any computer on your network, although only one computer can use it at a time.
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Port forwarding is configured for a single computer on your network.
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With port triggering, the modem router does not need to know the computer’s IP address
in advance. The IP address is captured automatically.
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Port forwarding requires that you specify the computer’s IP address during configuration, and the IP address can never change.
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Port triggering requires specific outbound traffic to open the inbound ports, and the triggered ports are closed after a period of no activity.
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Port forwarding is always active and does not need to be triggered.