ddns - Dynamic DNS
A self-hosted Dynamic DNS solution similar to DynDNS or NO-IP based on the
PowerDNS Remote Backend.
⚠️⚠️⚠️ Note regarding hosted version at ddns.pboehm.de
The hosted ddns service with custom hosts under the d.pboehm.de domain (e.g test.d.pboehm.de) is not available
anymore! I did not use this service for quite some time and recently there were some issues which resulted in downtime
and expiration of all registered hosts.
Alternatives
There is at least one other hosted version of pboehm/ddns that
can be found via Google
or you can host it yourself as described below.
How can I update my IP if it changes?
ddns is built around a small webservice, so that you can update your IP address simply by calling
an URL periodically through curl. Hosts that haven’t been updated for 10 days will
be automatically removed. This can be configured in your own instance.
An API similar to DynDNS/NO-IP has not been implemented yet.
Self-Hosting
Requirements
- A custom domain where the registrar allows setting
NS records for subdomains. This is important because not all
DNS providers support this.
- A server with docker and docker-compose installed
- The following ports should be opened in the firewall:
DNS-Setup
For the domain you want to use with ddns (example.net in the following sections, please adjust this to your domain)
you have to create the following two DNS records:
ddns.example.net as a CNAME or A/AAAA record pointing to the server ddns will be running on. This record
will be used for accessing the ddns frontend in your browser or via curl. It is also the target for the
corresponding NS record.d.example.net as an NS record pointing to the previously created ddns.example.net record. This will delegate
all subdomains under d.example.net to the PowerDNS server running on ddns.example.net.
ddns-Setup
The setup is now automated using docker-compose and only some customization has
to be made in a docker-compose.override.yml file
(a sample is available here).
Configuring the Setup
The setup included in this repository contains all the components described above and uses
caddy as a web server, because it provides automatic HTTPS using Lets Encrypt.
git clone [email protected]:pboehm/ddns.git
cd ddns/docker
cp docker-compose.override.yml.sample docker-compose.override.yml
Please adjust the settings in docker-compose.override.yml marked with the #<<< .... comments as follows:
- adjust the domain part in lines marked with
# <<< ADJUST DOMAIN according to your DNS-Setup
- insert your email address in lines marked with
# <<< INSERT EMAIL which is required for getting certificates
from Lets Encrypt
Finally execute the following docker-compose command, which creates 4 containers in detached mode which are also
started automatically after reboot. For updating an existing installation use the same command because it automatically
rebuilds the containers.
docker-compose --project-name ddns up -d --build
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