I can access my DYNDNS site while local, but not from outside of the same router.

It would help us help you if you are able to provide explicit details about the steps you have performed, from start to finish. If you use this guide as a basis, you can refer to the steps outlined there.

It would also help if you are willing to post the relevant hostname, as that would enable us to check whether it resolves to a valid public IP, whether the port is open, etc.

Please note that some ISPs (especially many US-based ISPs) block incoming connections on port 80. If your friend is affected by this, you would have to use a different port than port 80, and optionally use a WebHop.

I have followed every step in this guide. I think it is possible that the issue is with the ISP blocking port 80. I can easily change the port on the router, but is this all I need to do? If so what port should I use? What other things can I do. I am not to familiar with this type of issue. Thanks

You can theoretically use any port you desire, but I recommend using a high port number (higher than 1024) to avoid most conflicts with other software. For example, try port 1080 or 8080.

If the router supports differentiating between the public port and the internal port (e.g. forwarding port 8080 to a local device on port 80), then changing the port forwarding on the router is all you need to do. If the router does not support that, however, you need to change the listening port on the CCTV device as well. For example: Change the listening port to 8080 and forward that port on the router.

To be able to connect to the CCTV afterwards, you would have to specify the port number in the URL, such as http://yourhostname.dyndns.org:8080. If you find that to be difficult to remember, check out the WebHop redirect service, which can simplify this.

Hi! I have the exactly same problem with ip cameras. If this help the host name is lianakis.dyndns.org.