How to use DDNS service

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Using DDNS (Dynamic Domain Name System) service usually includes the following steps:

1. Choose DDNS service provider :

   • There are many different DDNS service providers, including No-IP, DynDNS, DuckDNS, etc. You should choose a service that meets your needs.

2. Register an account and choose a domain name :

   • Register for an account and follow the service provider's instructions to select a domain name. Some service providers may offer free subdomains.

3. Configure DDNS update client :

   • DDNS services usually provide an update client. The task of this client is to detect changes in your public IP address and automatically update the DNS records in the DDNS service.
   • Depending on your operating system and network environment, download and install the appropriate DDNS update client.

4. Install and configure the DDNS update client on your network device or server :

   • Install the DDNS update client on the network device or server you want to access, and follow the service provider's guidelines to configure the client.

5. Update DNS settings :

   • Enter your DDNS account information and the domain name of your choice in the DDNS update client. Make sure the client can automatically detect and update your public IP address.

6. Test DDNS setup :

   • Once you have completed the above setup, try accessing your DDNS domain name from the external network to ensure that it is correctly resolving to your public IP address.

7. Configure router port forwarding (if needed):

   • If you want to access certain services on your internal network from the outside, you may also need to configure port forwarding on your router.

In this way, whenever your public IP address changes, the DDNS update client will automatically update the DNS records to ensure that the domain name always points to your current IP address, thus realizing domain name resolution in a dynamic IP environment.