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README.md

IONOS DDNS Auto-Updater & Creator

A Python-based system service that automatically updates DNS records on IONOS. Unlike standard DDNS scripts, this solution uses the IONOS REST API, allowing it to:

Update existing DNS records.
Create new DNS records automatically if they don't exist.
Check the current DNS value before updating to avoid API rate limits.

Features

Smart Check: Compares public IP with current DNS resolution before sending API requests.
Auto-Discovery: Automatically detects which DNS Zone a subdomain belongs to.
System Service: Runs as a background systemd service with crash protection.
Logging: Detailed logs in /var/log/ionos-ddns.log.

Prerequisites

Python 3
An IONOS account with access to the "Developer API".
An API Key (Prefix + Secret) generated at developer.hosting.ionos.com.

Installation

1. Clone the repository to `/opt`

It is recommended to install this in a system directory.

sudo mkdir -p /opt/ionos-ddns
sudo git clone [https://github.com/TWOJA_NAZWA/ionos-ddns.git](https://github.com/TWOJA_NAZWA/ionos-ddns.git) /opt/ionos-ddns
cd /opt/ionos-ddns