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Not sure what your asking.<br />
&quot;Dyndns link&quot; ???<br />
&quot;Off and ON back the device&quot; &nbsp; what device?<br />
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Dyndns is a 3rd party DNS service, mainly used by people with ISP-assigned dynamic IP addresses.<br />
This allows you external access to your network, by name, no matter what IP address your ISP assigns.
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Not sure what your asking.
"Dyndns link" ???
"Off and ON back the device"   what device?

Dyndns is a 3rd party DNS service, mainly used by people with ISP-assigned dynamic IP addresses.
This allows you external access to your network, by name, no matter what IP address your ISP assigns.

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sorry should be more clear on this... has a link eg. <a href="http://xxx.dyndns.org" rel="ugc">http://xxx.dyndns.org</a>&nbsp; <br />
this link is working if accessed from internal network(within office), but not when outside the office. <br />
<br />

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sorry should be more clear on this... has a link eg. http://xxx.dyndns.org [http://xxx.dyndns.org] 
this link is working if accessed from internal network(within office), but not when outside the office.



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its caused by wrong gateway add at the device.
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its caused by wrong gateway add at the device.

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had a dyndns link working from internal network but not from external. what could be the causes for this besides trying to OFF and ON back the device?
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had a dyndns link working from internal network but not from external. what could be the causes for this besides trying to OFF and ON back the device?

dyndns link not working from external network

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.