===== Triggered Port Forwarding =====

Port Triggering is a dynamic form of Port Forwarding. Ports are opened when they are needed and closed when not in use. As a result, triggered ports are more secure than static (manually configured) forwarded ports.

With port triggering, an application on a LAN host initiates traffic towards the Internet. The Triggering function remembers the traffic pattern. When that same pattern is identified as incoming from the WAN, the appropriate inbound port-mapping occurs. Traffic is then allowed through and forwarded to the correct host/port. After a few minutes of inactivity, triggered ports are closed.

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The image below represents the default Triggered Port Forwarding page. \\   \\  {{:c2ae33c96d07fbb1cbb67f1056c7aa8f.png?809}}  \\   \\ If enabled, this rule would make FreshTomato listen to any traffic from the LAN towards the Internet. If it found packets within the 3000-4000 port range which satisfied the matching criteria, it would automatically enable port forwarding inbound in the 5000-6000 port range towards the LAN IP address that originated the request.

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**On:**  This enables and disables the Triggered Port Forwarding function.

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**Protocol:  **Here, select which protocols are triggered through the ports being forwarded.

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  * TCP - Only TCP traffic will be triggered for those port numbers.
  * UDP Only UDP traffic will be triggered for those port numbers.
  * Both - Both UDP and TCP traffic will be triggered for those port numbers.

\\  \\ **Trigger Ports:**  Here, enter the outbound ports to be monitored.

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**Forwarded Ports:**  Here, enter the port/s to be mapped when triggered.

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**Description:**  This fields lets you to enter notes notes as a reminder or reference.

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