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Open-source dynamic DNS update client for multiple services

Core Idea: ddclient is a lightweight Perl-based client that automatically updates dynamic DNS records across multiple providers, offering a unified solution for managing DNS updates regardless of service provider.

Key Elements

Key Features

• Open-source and freely available
• Supports numerous DDNS providers
• Lightweight with minimal resource requirements
• Highly configurable
• Multiple IP detection methods
• Runs on Linux, Unix, macOS, and other POSIX systems

Technical Specifications

• Written in Perl
• Configurable update intervals
• Multiple protocols supported
• IPv4 and IPv6 support
• SSL/TLS capabilities for secure updates
• Daemon mode for automatic background operation

Supported Providers

ddclient supports many dynamic DNS providers, including:

• DynDNS
• No-IP
• Duck DNS
• Cloudflare
• FreeDNS
• EasyDNS
• Namecheap
• Google Domains
• Many others through custom protocols

Implementation Steps

1. Install ddclient:

# Debian/Ubuntu
sudo apt-get install ddclient

# CentOS/RHEL
sudo yum install ddclient

# From source
git clone https://github.com/ddclient/ddclient.git
cd ddclient
sudo cp ddclient /usr/sbin/

2. Configure /etc/ddclient.conf:

# Basic configuration for Duck DNS
use=web, web=checkip.dyndns.org
protocol=duckdns
password=your-token-here
your-subdomain.duckdns.org

# Configuration for Cloudflare
use=web, web=checkip.dyndns.org
protocol=cloudflare
zone=yourdomain.com
login=your-cloudflare-email
password=your-global-api-key
yoursubdomain.yourdomain.com

3. Run as a daemon:

sudo systemctl enable ddclient
sudo systemctl start ddclient

Common IP Detection Methods

# Using a web service
use=web, web=checkip.dyndns.org

# Using an interface
use=if, if=eth0

# Using a script or command
use=cmd, cmd=/path/to/get-ip.sh

Additional Connections

• Broader Context: Dynamic DNS (ddclient is a tool for managing DDNS)
• Applications: Linux Server Administration (common use case)
• See Also: inadyn (alternative DDNS client), Dynamic DNS Providers

References

1. ddclient GitHub repository: https://github.com/ddclient/ddclient
2. ddclient documentation: https://ddclient.net/

#dynamic-dns #linux #open-source #networking #automation

Connections:

Sources:

• From: Worklog n8n.guiom.dev