Motorola 3347 - Manual (Page 63)

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Trigger Por ts for wards a range of por ts to an IP address on the LAN only after specific out-
bound traffic “triggers” the feature. Enter the following information:
• Service Name: A unique identifier for the Custom Service.
• Global Port Range: Range of ports on which incoming traffic will be received.
• Local Trigger Port: Port number of the type of outbound traffic that needs to happen
(will be the trigger) to then allow the configured por ts for inbound traffic.
Example: Set the trigger port to 21 and configure a range of 25 – 110. You would need
to do an outbound ftp before you were able to do an inbound smtp.
Click the Next button.
Static NAT
This feature allows you to:
• Direct your Router to for ward all externally initiated IP traffic (TCP and UDP protocols
only) to a default host on the LAN.
• Enable it for cer tain situations:
– Where you cannot anticipate what por t number or packet protocol an in-bound appli-
cation might use. For example, some network games select arbitrar y por t numbers
when a connection is opened.
– When you want all unsolicited traffic to go to a specific LAN host.