🔃 DynB

DynB - dynamic DNS update script, written in bash

IPv4 (A) and IPv6 (AAAA) record updates are supported.

• ✨ Update Methods
  • APIs
  • DynDNS2
• 📦 Requirements
• 🚀 Installation
• ⚙ Configuration
• 🏃 Run
• ⏰ Cron
• ⏰ docker

✨ Update Methods

The following update methods are currently implemented:

APIs

• INWX.com Domrobot JSON-RPC-API
  Limitations:
  • minimum TTL is 300 (5 minutes)

DynDNS2

• INWX.com
• deSEC.io (dedyn.io)
• DuckDNS.org
• dynv6.com

📦 Requirements

• curl - The minimum requirement for all API requests.
• dig - You can get it by installing dnsutils (debian/ubuntu/ArchLinux), bind-utils (CentOS/RHEL), bind-tools (Alpine)

also essential if you are using other APIs:

• jq - Command-line JSON processor

🚀 Installation

Download the latest release

or simply clone this repo

git clone https://github.com/EV21/dynb.git

If you want to add the script to you PATH, run 👇

bash dynb.sh --link

⚙ Configuration

You can use a config in form of an .env file. Or you can just use CLI parameters.

Create .env in the app root directory or at ~/.local/share/dynb/.env.

DYNB_DYN_DOMAIN=dyndns.example.com

## service provider could be deSEC, duckdns, dynv6, inwx
DYNB_SERVICE_PROVIDER=inwx

## update method options: domrobot, dyndns
DYNB_UPDATE_METHOD=domrobot

## ip mode could be either: 4, 6 or dual for dualstack
DYNB_IP_MODE=64

## If you are using the DomRobot RPC-API enter your credentials for the web interface login here
## If you are using the DynDNS2 protocol enter your credentials here
DYNB_USERNAME=User42
DYNB_PASSWORD=SuperSecretPassword
## or use a token
DYNB_TOKEN=

🏃 Run

If you have a config file just run 👇

dynb

Alternatively you can use parameters if your system meets the relevant requirements. This example shows the long form parameter, there are also short ones.
Call the help function 👇

dynb --help

dynb --ip-mode dualstack --update-method domrobot --domain dyndns.example.com --username user42 --password SuperSecretPassword

dynb --ip-mode dualstack --update-method dyndns --provider inwx --domain dyndns.example.com --username user42 --password SuperSecretPassword

⏰ Cron

To automatically call the script you can use either crontab or the script can also run in a loop mode.

loop mode

Just use the parameter --interval 60 or the environment variable DYNB_INTERVAL=60 so the script will check every 60 seconds if it needs to do an update.

crontab

execute 👇

crontab -e

then enter 👇 to run dynb every five minutes.

*/5 * * * * $HOME/.local/bin/dynb >> $HOME/.local/share/dynb/dynb-cron.log

Note, cron typically does not use the users PATH variable.

🐟 docker

This is an example of a docker-compose.yml file. If you are using IPv6 make sure the routing works properly with your docker container.

version: '3.4'

services:
  dynb:
    image: ev21/dynb
    container_name: dynb
    network_mode: host
    build:
      context: .
      dockerfile: ./Dockerfile
    environment:
      - DYNB_DYN_DOMAIN=dyndns.example.com
      - DYNB_SERVICE_PROVIDER=inwx
      - DYNB_UPDATE_METHOD=dyndns
      - DYNB_IP_MODE=64
      - DYNB_USERNAME=User42
      - DYNB_PASSWORD=SuperSecretPassword
      - DYNB_INTERVAL=60