Home Assistant Setup

How to Set Up Dynamic DNS with Home Assistant

In the world of home automation, accessibility and remote management play crucial roles. One of the challenges that enthusiasts face is maintaining access to their Home Assistant instance when they’re away from home. This is where Dynamic DNS (DDNS) comes into play. Dynamic DNS allows you to assign a memorable domain name to your home network, even if your internet service provider (ISP) assigns you a changing IP address. In this guide, we’ll explore the step-by-step process of setting up Dynamic DNS with Home Assistant.

What is Dynamic DNS (DDNS)?

Dynamic DNS is a service that automatically updates the DNS records for your domain name whenever your IP address changes. This is particularly useful for home networks, as most residential internet connections have dynamic IP addresses that change periodically. With DDNS, you can assign a hostname to your network, enabling you to access your Home Assistant instance from anywhere using a consistent URL.

Why Use Dynamic DNS with Home Assistant?

Using Dynamic DNS with Home Assistant offers several benefits:

  1. Remote Access: With a dynamic DNS setup, you can access your Home Assistant instance remotely, even if your IP address changes.
  2. Consistent URL: You can access your Home Assistant dashboard using a memorable domain name instead of relying on your changing IP address.
  3. Automation and Control: DDNS allows you to create automation rules and manage your smart devices even when you’re not at home.
  4. Security: Setting up secure remote access through DDNS ensures that your connection to your Home Assistant instance is encrypted and authenticated.

Setting Up Dynamic DNS with Home Assistant

Follow these steps to set up Dynamic DNS with Home Assistant:

Step 1: Choose a Dynamic DNS Provider

There are several Dynamic DNS providers available, both free and paid. Some popular options include:

  • DuckDNS: A free service that offers a subdomain under the duckdns.org domain.
  • No-IP: Offers both free and paid plans with various domain options.
  • Dynu: Provides both free and paid plans and supports a wide range of domains.

For this guide, we’ll use DuckDNS as the example.

Step 2: Sign Up for an Account

Go to the DuckDNS website (https://www.duckdns.org/) and sign up for an account. Follow their instructions to create your free subdomain.

Step 3: Configure Your Router

To enable DDNS, you’ll need to access your router’s settings. The exact steps may vary depending on your router’s brand and model, but the general process involves:

  1. Logging in to your router’s web interface (usually by typing the router’s IP address into a web browser).
  2. Locating the “Dynamic DNS” or “DDNS” section in your router’s settings.
  3. Entering the DDNS information you received from DuckDNS, including your subdomain, token, and other required details.

Save your settings, and your router will now automatically update your DuckDNS record whenever your IP address changes.

Step 4: Configure Home Assistant

  1. Install the DuckDNS Add-on: In Home Assistant, navigate to the “Supervisor” section, then “Add-on Store.” Search for the “DuckDNS” add-on and install it.
  2. Configure the Add-on: Enter your DuckDNS domain and token in the add-on configuration. You might need to configure port forwarding if you want to access your Home Assistant instance from outside your home network.
  3. Start the Add-on: Once configured, start the DuckDNS add-on.

Step 5: Update Home Assistant Configuration

  1. Edit Configuration.yaml: Go to your Home Assistant configuration directory and edit the configuration.yaml file.
  2. Add External URL: Add the following line to your configuration.yaml file to set up your external URL
    base_url: https://your-subdomain.duckdns.org
  1. Save and Restart: Save the changes and restart Home Assistant to apply the new configuration.

Testing Your Setup

To verify that your Dynamic DNS setup is working correctly:

  1. Access your Home Assistant dashboard using your new domain name (e.g., https://your-subdomain.duckdns.org).
  2. Make sure you can log in and interact with your devices and automation routines.

Security Considerations

While Dynamic DNS offers convenient remote access, security is of paramount importance:

  1. Use HTTPS: Always access your Home Assistant instance using HTTPS to encrypt your data in transit.
  2. Use Strong Passwords: Ensure your Home Assistant credentials are strong and unique.
  3. Enable Two-Factor Authentication (2FA): Implement 2FA to add an extra layer of security to your account.
  4. Regular Updates: Keep your Home Assistant instance and all add-ons up to date to patch any security vulnerabilities.


Setting up Dynamic DNS with Home Assistant allows you to overcome the challenge of changing IP addresses and provides convenient remote access to your home automation system. With the ability to use a consistent domain name, you can manage your smart devices, create automation routines, and monitor your home from anywhere in the world. Just remember to prioritize security by implementing encryption, strong passwords, and regular updates to ensure a safe and seamless remote home automation experience.

For more information on home automation benefits, check out this article on the <a href=”https://www.homeassistantcoach.com/how-to/home-assistant-setup/7-benefits-of-home-automation-systems-with-home-assistant/” target=”_blank”>7 Benefits of Home Automation Systems with Home Assistant</a>.

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