Strato DDNS

Helps setting dynamic DNS with Strato. Works for IPv4 and IPv6.

This all referes to dyndns with Strato. It's not testet with other providers nor checked for compatibility with any rfc!

Motivation

I wanted to use my webserver with IPv4 and IPv6 simultaneously. No problem with Apache. Worked with my Fritz!Box and my ISP. But somehow I couldn't manage to set it up with the dyndns-update-client I used. It was either IPv4 or IPv6, although Strato supports setting both at the same time. I was looking for an alternative client, but the way Strato describes seemed to be quiet simple, so I tried my self.

Configuration

A sample configuration is given.

• server: holds the provider's update server (dyndns.strato.com)
• query_url: holds the update path of the server (/nic/update?)
• login: your login, in case of Strato it's your domain (yourdomain.de)
• password: the password you have set for your domain to update your dyndns (look here for help)
• domain: the domain you want to update, use "," to seperate multiple domains
• ipv4: use web for automatic lookup, use static IP if available
• ipv6: see ipv4, if web is used, ipv6_suffix must be set
• ipv6_suffix: your router might give your host a stativ IPv6 suffix. You must use this, your public IPv6 won't work with port forwarding only! If the Network changes the software will use the new Network but the same IPv6 suffix.
• ipv6_netmask: you might want to set a custom netmask (Default is: 64)
• nameserver: optionaly set your own nameservers to lookup the acually used IP-Addresses seperated by ",". Default is: 8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844

Commandline arguments

• -h: help
• --config/-c <path>: set a path to your own configurationfile, default is ../stato_ddns.conf
• --debug/-d: get detailed information to find errors
• --dryrun/-t: doesn't do any change, best use with -d to find errors without triggering the abuseblocker

Docker

Use the following steps to run the script in docker:

1. Install docker on your machine (https://docs.docker.com/get-docker/)
2. Adjust the docker container to your needs
   • Update the commandline arguments and cron-shedule in Dockerfile
3. Build your docker image:
   1. Open the directory of the project.
   2. Run docker build -t strato_ddns:latest .
4. Update the configuration file.
5. Run the container:
   • Use network host or ensure that the container supports ipv6 if needed.
   • docker run -d --name strato-ddns-container --network=host -v /path/to/your/config:/etc/config --restart unless-stopped strato_ddns:latest

What is next?

Until now this tool runs as a program only, in a crontab e.g.. Next step will be to make it useable as a daemon.