Lightweight universal DDNS Updater with Docker and web UI

Light container updating DNS A records periodically for GoDaddy, Namecheap, Cloudflare, Dreamhost, NoIP, DNSPod, Infomaniak, ddnss.de and DuckDNS

Features

• Updates periodically A records for different DNS providers: Namecheap, GoDaddy, Cloudflare, NoIP, Dreamhost, DuckDNS, DNSPod and Infomaniak (ask for more)
• Web User interface

• 12.3MB Docker image based on a Go static binary in a Scratch Docker image with ca-certificates and timezone data
• Persistence with a JSON file updates.json to store old IP addresses with change times for each record
• Docker healthcheck verifying the DNS resolution of your domains
• Highly configurable
• Sends notifications to your Android phone, see the Gotify section (it's free, open source and self hosted 🆒)
• Compatible with amd64, 386, arm64, arm32v7 (Raspberry Pis) CPU architectures.

Setup

1. To setup your domains initially, see the Domain set up section.

2. Create a directory of your choice, say data with a file named config.json inside:

   mkdir data
   touch data/config.json
   # Owned by user ID of Docker container (1000)
   chown -R 1000 data
   # all access (for creating json database file data/updates.json)
   chmod 700 data
   # read access only
   chmod 400 data/config.json
   

   (You could change the user ID, for example with 1001, by running the container with --user=1001)

3. Modify the data/config.json file similarly to:

   {
       "settings": [
           {
               "provider": "namecheap",
               "domain": "example.com",
               "host": "@",
               "ip_method": "provider",
               "delay": 86400,
               "password": "e5322165c1d74692bfa6d807100c0310"
           },
           {
               "provider": "duckdns",
               "domain": "example.duckdns.org",
               "ip_method": "provider",
               "token": "00000000-0000-0000-0000-000000000000"
           },
           {
               "provider": "godaddy",
               "domain": "example.org",
               "host": "subdomain",
               "ip_method": "duckduckgo",
               "key": "aaaaaaaaaaaaaaaa",
               "secret": "aaaaaaaaaaaaaaaa"
           }
       ]
   }
   

   See more information in the configuration section

4. Use the following command:

   docker run -d -p 8000:8000/tcp -v "$(pwd)"/data:/updater/data qmcgaw/ddns-updater
   

   You can also use docker-compose.yml with:

   docker-compose up -d
   

5. You can update the image with docker pull qmcgaw/ddns-updater. Other Docker image tags are available.

Configuration

Start by having the following content in config.json:

{
    "settings": [
        {
            "provider": "",
            "domain": "",
            "ip_method": "",
        },
        {
            "provider": "",
            "domain": "",
            "ip_method": "",
        }
    ]
}

The following parameters are to be added in config.json

For all record update configuration, you need the following:

• "provider" is the DNS provider and can be "godaddy", "namecheap", "duckdns", "dreamhost", "cloudflare", "noip", "dnspod" or "ddnss"
• "domain"
• "ip_method" is the method to obtain your public IP address and can be:
  • "provider" means the public IP is automatically determined by the DNS provider (only for DuckDNs, Namecheap, Infomaniak and NoIP), most reliable.
  • "opendns" using https://diagnostic.opendns.com/myip (reliable)
  • "ifconfig" using https://ifconfig.io/ip (may be rate limited)
  • "ipinfo" using https://ipinfo.io/ip (may be rate limited)
  • "ipify" using https://api.ipify.org (may be rate limited)
  • "ipify6" using https://api6.ipify.org for IPv6 only (may be rate limited)
  • "ddnss" using https://ddnss.de/meineip.php
  • "ddnss4" using https://ip4.ddnss.de/meineip.php for IPv4 only
  • "ddnss6" using https://ip6.ddnss.de/meineip.php for IPv6 only
  • "cycle" to cycle between each external methods, in order to avoid being rate limited
  • You can also specify an HTTPS URL to obtain your public IP address (i.e. "ip_method": "https://ipinfo.io/ip")

You can optionnally add the parameters:

• "delay" is the delay in seconds between each update. It defaults to the DELAY environment variable value.
• "no_dns_lookup" can be true or false and allows, if true, to prevent the periodic Docker healthcheck from running a DNS lookup on your domain.

For each DNS provider exist some specific parameters you need to add, as described below:

Namecheap:

• "host" is your host and can be a subdomain, "@" or "*" generally
• "password"

Cloudflare:

• "zone_identifier"
• "identifier"
• "host" is your host and can be a subdomain, "@" or "*" generally
• "ttl" integer value for record TTL in seconds (specify 1 for automatic)
• One of the following:
  • Email "email" and key "key"
  • User service key "user_service_key"
  • API Token "token", configured with DNS edit permissions for your DNS name's zone.
• Optionally, "proxied" can be true or false to use the proxy services of Cloudflare

GoDaddy:

• "host" is your host and can be a subdomain, "@" or "*" generally
• "key"
• "secret"

DuckDNS:

• "token"

Dreamhost:

• "key"

NoIP:

• "host" is your host and can be a subdomain or "@"
• "username"
• "password"

DNSPOD:

• "host" is your host and can be a subdomain or "@"
• "token"

Infomaniak:

• "user"
• "password"
• "host" is your host and can be a subdomain or "@"
• "ip_version" can be ipv4 (A records) or ipv6 (AAAA records)

DDNSS.de:

• "user"
• "password"
• "host" is your host and can be a subdomain or "@"
• "ip_version" can be ipv4 (A records) or ipv6 (AAAA records)

Environment variables

Environment variable	Default	Description
DELAY	10m	Default delay between updates, following this format
ROOT_URL	/	URL path to append to all paths to the webUI (i.e. /ddns for accessing https://example.com/ddns through a proxy)
LISTENING_PORT	8000	Internal TCP listening port for the web UI
LOG_ENCODING	console	Format of logging, json or console
LOG_LEVEL	info	Level of logging, info, warning or error
NODE_ID	0	Node ID (for distributed systems), can be any integer
HTTP_TIMEOUT	10s	Timeout for all HTTP requests
GOTIFY_URL		(optional) HTTP(s) URL to your Gotify server
GOTIFY_TOKEN		(optional) Token to access your Gotify server

Host firewall

If you have a host firewall in place, this container needs the following ports:

• TCP 443 outbound for outbound HTTPS
• TCP 80 outbound if you use a local unsecured HTTP connection to your Gotify server
• UDP 53 outbound for outbound DNS resolution
• TCP 8000 inbound (or other) for the WebUI

Domain set up

Namecheap

1. Create a Namecheap account and buy a domain name - example.com as an example
2. Login to Namecheap at https://www.namecheap.com/myaccount/login.aspx

For each domain name you want to add, replace example.com in the following link with your domain name and go to https://ap.www.namecheap.com/Domains/DomainControlPanel/example.com/advancedns

1. For each host you want to add (if you don't know, create one record with the host set to *):

   1. In the HOST RECORDS section, click on ADD NEW RECORD

      

   2. Select the following settings and create the A + Dynamic DNS Record:

      

2. Scroll down and turn on the switch for DYNAMIC DNS

   

3. The Dynamic DNS Password will appear, which is 0e4512a9c45a4fe88313bcc2234bf547 in this example.

   

---

GoDaddy

1. Login to https://developer.godaddy.com/keys with your account credentials.

1. Generate a Test key and secret.

1. Generate a Production key and secret.

Obtain the key and secret of that production key.

In this example, the key is dLP4WKz5PdkS_GuUDNigHcLQFpw4CWNwAQ5 and the secret is GuUFdVFj8nJ1M79RtdwmkZ.

---

DuckDNS

See duckdns website

Cloudflare

1. Make sure you have curl installed

2. Obtain your API key from Cloudflare website (see this)

3. Obtain your zone identifier for your domain name, from the domain's overview page written as Zone ID

4. Find your identifier in the id field with

   ZONEID=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   EMAIL=example@example.com
   APIKEY=aaaaaaaaaaaaaaaaaa
   curl -X GET "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records" \
       -H "X-Auth-Email: $EMAIL" \
       -H "X-Auth-Key: $APIKEY"
   

You can now fill in the necessary parameters in config.json

Special thanks to @Starttoaster for helping out with the documentation and testing.

Gotify

Gotify is a simple server for sending and receiving messages, and it is free, private and open source

• It has an Android app to receive notifications
• The app does not drain your battery 👍
• The notification server is self hosted, see how to set it up with Docker
• The notifications only go through your own server (ideally through HTTPS though)

To set it up with DDNS updater:

1. Go to the Web GUI of Gotify
2. Login with the admin credentials
3. Create an app and copy the generated token to the environment variable GOTIFYTOKEN (for this container)
4. Set the GOTIFYURL variable to the URL of your Gotify server address (i.e. http://127.0.0.1:8080 or https://bla.com/gotify)

Testing

• The automated healthcheck verifies all your records are up to date using DNS lookups
• You can check manually at:

  • GoDaddy: https://dcc.godaddy.com/manage/yourdomain.com/dns (replace yourdomain.com)

    

    You might want to try to change the IP address to 127.0.0.1 to see if the update actually occurs.

Development

1. Setup your environment

   Using VSCode and Docker (easier)

   1. Install Docker
      • On Windows, share a drive with Docker Desktop and have the project on that partition
      • On OSX, share your project directory with Docker Desktop
   2. With Visual Studio Code, install the remote containers extension
   3. In Visual Studio Code, press on F1 and select Remote-Containers: Open Folder in Container...
   4. Your dev environment is ready to go!... and it's running in a container 👍 So you can discard it and update it easily!

   Locally

   1. Install Go, Docker and Git

   2. Install Go dependencies with

      go mod download
      

   3. Install golangci-lint

   4. You might want to use an editor such as Visual Studio Code with the Go extension. Working settings are already in .vscode/settings.json.

2. Commands available:

   # Build the binary
   go build cmd/app/main.go
   # Test the code
   go test ./...
   # Lint the code
   golangci-lint run
   # Build the Docker image
   docker build -t qmcgaw/ddns-updater .
   

3. See Contributing for more information on how to contribute to this repository.

Used in external projects

• Starttoaster/docker-traefik

TODOs

• Update dependencies
• Mockgen instead of mockery
• Other types or records
• icon.ico for webpage
• Record events log
• Hot reload of config.json
• Unit tests
• ReactJS frontend
  • Live update of website
  • Change settings