This guide explains how to access your Home Assistant smart home hub (which is behind a dynamic IP address provided by your ISP) with a domain name from Infomaniak via the free DynDNS option and a free script available here.

Introduction

• The integration you install acts as a messenger: it continuously monitors the IP address of your local network.
• As soon as it detects that your ISP has changed your IP address, it instantly sends a signal to Infomaniak.
• Infomaniak then updates your domain name (e.g., ha.domain.xyz) to point to the new IP address.

Install Infomaniak DynDNS — Home Assistant Integration

Prerequisites

• You must have a Home Assistant installation (e.g., on a Raspberry Pi 5) connected to the internet with a dynamic IP address.
• A dynamic DNS must have been created on the domain in question.

Then:

1. Log in to your Home Assistant back office.
2. Install HACS if you haven't already; go to the settings of Home Assistant:
   
3. Install the Terminal & SSH app:
   
4. In this terminal, enter the command wget -O - https://get.hacs.xyz | bash -:
5. Once HACS is installed, restart Home Assistant.
6. Activate HACS by searching for it in the integrations:
   
7. Once the validation via Github is complete, return to HACS installed in your left sidebar, then click on the action menu ⋮ in the upper right corner of the HACS interface to choose the custom repositories:
   
8. Enter the URL https://github.com/cy-bertrand/Infomaniak-dyndns-ha and choose the Integration type, before clicking on Add:
   
9. Then search for Infomaniak DynDNS and click on it:
   
10. Install this service by clicking on the Download button in the bottom right corner:
    
11. Restart Home Assistant.

Configure Infomaniak DynDNS — Home Assistant Integration

To do this:

1. Click on Settings in the left sidebar menu of HA.
2. Click on Devices & services:
   
3. Click on the button to Add integration.
4. Click on Infomaniak DynDNS:
   
5. Configure your equipment:
   
   1. Hostname: the URL configured in the Manager when adding the Dynamic DNS
   2. Username: the identifier defined in the Manager when adding the Dynamic DNS
   3. Password: the password defined in the Manager when adding the Dynamic DNS
6. Validate at the bottom of the page.
7. Give the entity a name and save your changes by clicking Finish:
   

Home Assistant will check the external IP address every 15 minutes. If it has changed, the DNS will be updated. This way, your domain name will continuously point to your home automation installation, even if your Internet Service Provider changes your public IP address.

Also, refer to the official plugin documentation.