# 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:
1. **Update** existing DNS records.
2. **Create** new DNS records automatically if they don't exist.
3. 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](https://developer.hosting.ionos.com/).

## Installation

### 1. Clone the repository to `/opt`
It is recommended to install this in a system directory.

```bash
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