DDNS Dynamic Resolution

What is DDNS?

DDNS (Dynamic DNS) allows you to bind a fixed domain name to a dynamic IP address, suitable for home broadband users accessing internal network devices such as NAS, smart home controllers, etc.

Feature Highlights

• Easy to use: Only requires a single script to achieve automatic updates
• Zero additional cost: No need to purchase a domain
• High reliability: Built on NullPrivate’s DNS infrastructure
• Fast propagation: DNS records take effect immediately after update, no DNS propagation wait required

Usage Guide

You can find the DDNS script download address under Filters->DNS Rewriting.

FAQ

How to verify if it’s working?

Check if resolution points correctly to your current IP address using the ping your-domain.name command.

Or log in to the service backend and view records under Filters->DNS Rewriting.

How to schedule automatic updates?

Windows Task Scheduler

1. Open Task Scheduler
2. Create Basic Task
3. Set execution frequency (recommended 15-30 minutes)
4. Select PowerShell as program location, enter full script command in parameters

Linux Cron Job

Add the following to crontab (executes every 15 minutes):

*/15 * * * * /path/to/update_dns.sh https://xxxxxxxx.adguardprivate.com admin:password123 nas.home

Important Notes

• Keep your username and password secure to prevent leakage
• Recommended to add update script to system scheduled tasks for automatic execution
• If resolution doesn’t take effect promptly, check network connection and credential validity