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| Chapter 12 Network Address Translation (NAT) |
| Table 46 Network Settings > NAT > Port Triggering (continued) | |
| LABEL | DESCRIPTION |
| WAN Interface | This field shows the WAN interface through which the service is |
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| forwarded. |
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| Trigger Port | The trigger port is a port (or a range of ports) that causes (or triggers) |
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| the ZyXEL Device to record the IP address of the LAN computer that sent |
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| the traffic to a server on the WAN. |
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| Start | This is the first port number that identifies a service. |
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| End | This is the last port number that identifies a service. |
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| Trigger Proto. | This is the trigger transport layer protocol. |
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| Open | The open port is a port (or a range of ports) that a server on the WAN |
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| uses when it sends out a particular service. The ZyXEL Device forwards |
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| the traffic with this port (or range of ports) to the client computer on the |
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| LAN that requested the service. |
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| Start | This is the first port number that identifies a service. |
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| End | This is the last port number that identifies a service. |
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| Open Proto. | This is the open transport layer protocol. |
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| Modify | Click the Edit icon to edit this rule. |
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| Click the Delete icon to delete an existing rule. |
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12.4.1 Add/Edit Port Triggering Rule
This screen lets you create new port triggering rules. Click Add new rule in the Port Triggering screen or click a rule’s Edit icon to open the following screen.
Figure 69 Port Triggering: Add/Edit
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