Dns clients not updating
Next, to the hostname, you will see the IP address that we are currently resolving to.
The easiest way to test this is to run an NSLOOKUP command from a Terminal window.
You will also want to make sure your computers have all the latest patches and security updates applied, in order to minimize the possibility of someone compromising your network. If your computer has a firewall turned on, you will need to configure it to allow inbound connections.
If this is not setup properly any inbound connection of your network will fail.
Replace the IP address being shown with the IP address you received from Port Check Tool and click Update Host at the bottom right of the page.
It will take 60 seconds for the changes to fully propagate to the new IP address.
You can also check to see if your device (router, camera, etc) supports Dynamic DNS and has No-IP as an integrated provider.