There is one mandatory precondition for DDNS to work, you must have a '''Static or Dynamic Public IP address'''. One of the easiest ways to check what IP address you have is to simply visit a website such as [https://whatismyipaddress.com/ www.whatismyipaddress.com] and compare the IP address shown there to the one you see in the router's WebUI. There are many ways how you can check what IP address your router has, a couple of those are:
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There is one mandatory precondition for DDNS to work, you must have a '''Static or Dynamic Public IP address'''. One of the easiest ways to check what IP address you have is to simply visit a website such as [https://whatismyipaddress.com/ www.whatismyipaddress.com] and compare the IP address shown there to the one you see in the {{{device}}}'s WebUI. There are many ways how you can check what IP address your device has, a couple of those are:
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* Go to router's WebUI '''Overview''' page and check that in one of the widgets.
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* Go to {{{device}}}'s WebUI '''Overview''' page and check that in one of the widgets.
* Go to '''Network → Interfaces''' page and check what IP address your WAN interface has.
* Go to '''Network → Interfaces''' page and check what IP address your WAN interface has.
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If the IP address shown in [https://whatismyipaddress.com/ www.whatismyipaddress.com] is different to the one you see in the WebUI, it means that you're using a '''Shared Public IP''' and you won't be able to reach your router even if you would use DDNS.
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If the IP address shown in [https://whatismyipaddress.com/ www.whatismyipaddress.com] is different to the one you see in the WebUI, it means that you're using a '''Shared Public IP''' and you won't be able to reach your device even if you would use DDNS.