TRENDnet TEW-631BRP - Manual (Page 66)

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Timeout
The time between periodic updates to the Dynamic DNS, if your dynamic IP address has not
changed. The timeout period is entered in hours.
If a dynamic DNS update fails for any reason (for example, when incorrect parameters are
entered), the router automatically disables the Dynamic DNS feature and records the
failure in the log.
After configuring the router for dynamic DNS, you can open a browser and navigate to the
URL for your domain (for example http://www.mydomain.info) and the router will attempt
to forward the request to port 80 on your LAN. If, however, you do this from a LAN-side
computer and there is no virtual server defined for port 80, the router will return the
router's configuration home page. Refer to the
Advanced -> Virtual Server configuration
page to set up a virtual server.