ddclient vs ddns-updater vs inadyn: Best Self-Hosted DDNS Clients 2026

If you run a self-hosted server from home — a media server, a personal cloud, a home automation hub, or any service you want to reach from the internet — you face one universal problem: most residential ISPs assign dynamic IP addresses that change periodically. When your IP changes, your DNS record points to the wrong address and your services go offline.

A Dynamic DNS (DDNS) client solves this by automatically detecting your public IP and updating your DNS records whenever it changes. The three most popular self-hosted options are ddclient, ddns-updater, and inadyn. This guide compares all three to help you pick the right tool for your setup.

Why You Need a Self-Hosted DDNS Client

Many DDNS providers offer their own lightweight update clients, but these come with limitations:

• Vendor lock-in — a provider’s official client only works with that provider’s DNS service
• No redundancy — if the provider’s client crashes, you lose DNS updates entirely
• Privacy concerns — third-party clients report your IP to external servers you don’t control
• Limited provider support — most official clients handle only one or two DNS providers

A self-hosted DDNS client running in your own infrastructure solves all of these problems. You can manage updates for multiple DNS providers from a single tool, run it as a systemd service or docker container, and keep full control over the update schedule, logging, and credentials.

Combined with a self-hosted DNS resolver for local resolution and tunnel alternatives for NAT traversal, DDNS clients form the backbone of a reliable home server setup.

The Contenders at a Glance

ddclient — The Battle-Tested Standard

ddclient is the oldest and most widely deployed DDNS client. Written in Perl, it has been the default choice on many Linux distributions for over a decade. It supports 30+ DNS providers including Cloudflare, GoDaddy, Namecheap, No-IP, DuckDNS, Google Domains, and DynDNS.

When to Choose ddclient

• You want the maximum provider support — ddclient covers more DNS services than any other option
• You’re running on a traditional Linux server with Perl already installed
• You need mature, well-documented configuration with decades of community knowledge
• You prefer a package manager install — ddclient is in Debian, Ubuntu, Fedora, and Arch repos

Installation on Debian/Ubuntu

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sudo apt update
sudo apt install ddclient

During installation, the package prompts for your DNS provider and credentials. You can also configure manually:

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# /etc/ddclient.conf
daemon=300                          # check every 5 minutes
syslog=yes                          # log to syslog
pid=/var/run/ddclient.pid           # record PID
ssl=yes                             # use SSL for updates

# Cloudflare example
use=web, web=checkip.dyndns.com
server=api.cloudflare.com/client/v4/
login=your-email@example.com
password=your-api-token
your-domain.com

Installation on RHEL/CentOS/Fedora

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# Fedora
sudo dnf install ddclient

# RHEL/CentOS (EPEL required)
sudo dnf install epel-release
sudo dnf install ddclient

Running as a Daemon

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sudo systemctl enable ddclient
sudo systemctl start ddclient
sudo systemctl status ddclient

Using ddclient with Docker

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version: "3.8"
services:
  ddclient:
    image: linuxserver/ddclient:latest
    container_name: ddclient
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
    volumes:
      - ./config:/config
    restart: unless-stopped

ddns-updater — The Modern Docker-Native Choice

qdm12/ddns-updater is a Go-based DDNS client designed specifically for containerized environments. Its standout feature is a built-in web UI that lets you manage all your DNS records from a browser, plus native support for notification webhooks (Gotify, Shoutrrr) when IP changes are detected.

When to Choose ddns-updater

• You run Docker or Docker Compose — this is the most Docker-native option available
• You want a visual web interface to monitor and manage your DNS records
• You need notification alerts when your IP changes (Gotify, email, Slack, etc.)
• You prefer JSON configuration over Perl-style config files
• You want active development — last updated April 2026 with regular releases

Docker Compose Setup

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version: "3.8"
services:
  ddns-updater:
    image: qmcgaw/ddns-updater:latest
    container_name: ddns-updater
    ports:
      - "8000:8000"
    volumes:
      - ./data:/updater/data
    environment:
      - PERIOD=5m
      - PUBLICIP_FETCHERS=all
      - PUBLICIP_HTTP_PROVIDERS=all
      - PUBLICIPV4_HTTP_PROVIDERS=all
      - PUBLICIPV6_HTTP_PROVIDERS=all
      - SHOUTRRR_ADDRESSES=discord://token@channel
    restart: unless-stopped

JSON Configuration

Create ./data/config.json:

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{
  "settings": [
    {
      "provider": "cloudflare",
      "zone_identifier": "your-zone-id",
      "domain": "your-domain.com",
      "host": "@",
      "ttl": 1,
      "token": "your-cloudflare-api-token",
      "ip_version": "ipv4"
    },
    {
      "provider": "duckdns",
      "domain": "myhome.duckdns.org",
      "token": "your-duckdns-token",
      "ip_version": "ipv4"
    },
    {
      "provider": "namecheap",
      "domain": "your-domain.com",
      "host": "*",
      "password": "your-namecheap-dynamic-dns-password"
    }
  ]
}

Web UI Access

Once running, open http://your-server:8000 in your browser. The dashboard shows:

• Current IP address and update status for each record
• Last update timestamp and any errors
• Manual trigger buttons for immediate updates
• Health check endpoint for monitoring tools

Notification Setup

ddns-updater integrates with Shoutrrr for notifications. Supported channels include Discord, Slack, Telegram, email, Gotify, and Pushover:

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environment:
  - SHOUTRRR_ADDRESSES=discord://webhook_id:webhook_token@channel
  - SHOUTRRR_ADDRESSES=telegram://token@telegram?channels=channel-name

inadyn — The Lightweight Embedded Option

inadyn (In-a-Dyn) is a C-based DDNS client built for minimal resource consumption. At roughly 2 MB of RAM, it runs on routers, Raspberry Pis, and embedded systems where every byte of memory counts. It supports OpenSSL or mbedTLS for secure updates.

When to Choose inadyn

• You’re on resource-constrained hardware — routers, Raspberry Pi Zero, embedded boards
• You need the smallest possible footprint — inadyn is ~50 KB compiled
• You want native C performance — no interpreter or runtime dependencies
• You’re building a minimal container image (Alpine, distroless)
• You prefer a simple, straightforward config format

Installation on Debian/Ubuntu

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sudo apt update
sudo apt install inadyn

Installation from Source

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sudo apt install build-essential libconfuse-dev libssl-dev pkg-config

git clone https://github.com/troglobit/inadyn.git
cd inadyn
./autogen.sh
./configure --with-ssl=openssl
make
sudo make install

Configuration

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# /etc/inadyn.conf
period = 300          # check every 5 minutes

provider cloudflare.com {
    hostname = "your-domain.com"
    username = "your-email@example.com"
    ddns-password = "your-api-token"
    ssl = true
}

provider duckdns.org {
    hostname = "myhome.duckdns.org"
    ddns-password = "your-duckdns-token"
    ssl = true
}

provider no-ip.com {
    hostname = "myserver.no-ip.org"
    username = "your-no-ip-username"
    ddns-password = "your-no-ip-password"
    ssl = true
}

Running as a Systemd Service

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sudo systemctl enable inadyn
sudo systemctl start inadyn
sudo systemctl status inadyn

Docker Container

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version: "3.8"
services:
  inadyn:
    image: troglobit/inadyn:latest
    container_name: inadyn
    volumes:
      - ./inadyn.conf:/etc/inadyn.conf:ro
    restart: unless-stopped
    read_only: true

Comparison: Provider Support

All three tools support the major DDNS providers, but the breadth varies:

Supported DNS Providers (Extended)

ddclient supports the widest range: Cloudflare, CloudXNS, ConoHa, ClouDNS, deSEC, Dinahosting, Directnic, DNS Made Easy, DNS Park, DNS-O-Matic, DNSexit, DNSimple, Domainorama, Dove, DynDNS, DynSIP, EasyDNS, Enom, GoDaddy, Google, Hurricane Electric, He.net, HostUmbrella, Infomaniak, Intercage, INWX, Loopia, Mythic Beasts, Namecheap, No-IP, NS1, OVH, Porkbun, Regfish, Time, Variomedia, and more.

ddns-updater covers: Cloudflare, Custom (generic API), DD24.de, DDNSS.de, deSEC, Dminiode Easy, DNSPod, DonDominio, DuckDNS, DynDNS, DNSimple, Dynu, EasyDNS, FreeDNS, Gandi, Gandi LiveDNS, GoDaddy, GoIP.de, He.net, Hetzner, Infomaniak, Ionos, Joker, Linode, LuaDNS, Name.com, Namecheap, Netcup, No-IP, NoIP, OVH, Porkbun, Reg.ru, Scaleway, Selfhost.de, Servercow, Simply.com, Spdyn, Strato, Variomedia, and Zoneedit.

inadyn supports: Cloudflare, deSEC, DNS Made Easy, DuckDNS, DynDNS, EasyDNS, FreeDNS, GoDaddy, Hurricane Electric, INWX, Loopia, Namecheap, No-IP, OVH, Porkbun, Regfish, Strato, and Yandex.

Which DDNS Client Should You Choose?

Best Overall: ddclient

If you want the most provider support and a battle-tested tool that runs everywhere, ddclient is the safe choice. It is the default on many Linux distributions, has the most extensive documentation, and handles edge cases that have been ironed out over 15+ years of development.

Best for Docker: ddns-updater

If you run Docker, ddns-updater is the clear winner. Its web UI, native container support, notification webhooks, and active development make it the most modern and user-friendly option. The JSON configuration is cleaner than ddclient’s Perl-style format.

Best for Embedded: inadyn

If you are running on a Raspberry Pi Zero, router, or any resource-constrained device, inadyn’s tiny footprint (2 MB RAM, 50 KB binary) makes it the only sensible choice. It is fast, stable, and has no runtime dependencies beyond OpenSSL or mbedTLS.

Deployment Best Practices

1. Use HTTPS for All Updates

Never send DDNS credentials over plain HTTP. All three tools support SSL/TLS — enable it explicitly:

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# ddclient: ssl=yes
# ddns-updater: ssl is enabled by default
# inadyn: ssl = true

2. Set Appropriate Update Intervals

Most DNS providers rate-limit updates. A 5-minute check interval (300 seconds) is a safe default:

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# ddclient: daemon=300
# ddns-updater: PERIOD=5m
# inadyn: period = 300

3. Use API Tokens, Not Passwords

Where possible, use API tokens instead of account passwords. Cloudflare, GoDaddy, and Namecheap all support scoped API tokens that can only update DNS records — if the token is compromised, your account remains safe.

4. Monitor IP Change Notifications

Set up alerts so you know when your IP changes. ddns-updater has this built in via Shoutrrr. For ddclient and inadyn, you can wrap them in a script that sends notifications:

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#!/bin/bash
# Wrapper script to monitor IP changes with inadyn
OLD_IP=$(cat /tmp/current_ip.txt 2>/dev/null)
NEW_IP=$(curl -s https://api.ipify.org)

if [ "$OLD_IP" != "$NEW_IP" ]; then
    echo "IP changed: $OLD_IP → $NEW_IP"
    # Send notification via curl, email, etc.
    echo "$NEW_IP" > /tmp/current_ip.txt
fi

5. Run Behind a Reverse Proxy

If you expose your DDNS client’s web UI (ddns-updater), place it behind a reverse proxy with TLS termination.nginxa complete reverse proxy setup, see our nginx vs Caddy vs Traefik comparison.

FAQ

What is Dynamic DNS (DDNS) and why do I need it?

Dynamic DNS automatically updates your domain’s DNS records when your home IP address changes. Most residential ISPs assign dynamic IPs that can change at any time — when they do, your domain points to the wrong address and your self-hosted services become unreachable. A DDNS client monitors your public IP and pushes updates to your DNS provider within minutes of any change.

Can I use DDNS with Cloudflare?

Yes, all three tools support Cloudflare. You need your Cloudflare API token (not your account password) and your zone ID. In Cloudflare, create an API token with “DNS: Edit” permission for your specific zone. ddns-updater and ddclient both support Cloudflare’s v4 API natively.

How often should the DDNS client check for IP changes?

A 5-minute interval (300 seconds) is recommended. Most residential IPs change rarely — typically only after a router reboot or ISP maintenance — but checking frequently ensures updates happen within minutes. Some providers rate-limit updates, so avoid intervals shorter than 60 seconds.

Can I manage multiple domains and subdomains with one DDNS client?

Yes, all three tools support multiple DNS records in a single configuration. ddclient and inadyn allow you to define multiple provider blocks, each with different hostnames. ddns-updater uses a JSON array where each entry is a separate DNS record, making it easy to manage dozens of domains from one instance.

Is ddns-updater’s web UI secure?

The web UI is accessible on your local network by default. For internet-facing access, you should place it behind a reverse proxy with TLS and add authentication. The UI itself does not expose API tokens — they are stored in the config file on disk. You can also restrict access using Docker network isolation or firewall rules.

Which DDNS client works best on a Raspberry Pi?

For a Raspberry Pi 3 or 4, any of the three tools work well. For a Pi Zero or other resource-constrained boards, inadyn is the best choice — it uses only ~2 MB of RAM and has no runtime dependencies. ddns-updater (Go-based, ~15 MB) is also lightweight enough for most Pi models.

What happens if my DDNS client goes offline?

If the client stops running, your DNS record will continue pointing to your last known IP. If your IP changes while the client is down, your services become unreachable until the client restarts and sends an update. For critical services, consider running the DDNS client as a systemd service with Restart=always or as a Docker container with restart: unless-stopped.

Do I still need DDNS if I use a tunnel service like Tailscale?

Tunnel services like Tailscale, ZeroTier, or Cloudflare Tunnels can bypass the need for DDNS in many cases because they create encrypted tunnels that work behind NAT. However, if you want direct public access to your services (e.g., for external APIs, public websites, or email servers), you still need DDNS to keep your public DNS records accurate. For a comparison of tunnel options, see our self-hosted tunnel guide.