File README.md of Package dns24-update

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File README.md of Package dns24-update

# dns24-updater

[DNS24](https://www.dns24.ch) is a free DNS hosting service, offering a
complete and comprehensive set of DNS management features, complemented by
dynamic DNS support and URL redirection. It is free of charge for up to 2
domains.

This package provides a simple "client" for updating dynamic DNS records hosted
by DNS24.

## How it works

DNS24 offers an HTTP API for updating dynamic DNS records. This update client
uses the curl command to send update requests.

The curl parameters required for updating one or more domains are defined in
configuration files stored in `/etc/dns24/`. The configuration files must have
the ".curl" suffix.

The systemd unit "dns24@.service" can be instantiated with the name of a .curl
parameter file in /etc/dns24/ to execute an update using those parameters. An
associated timer unit can be enabled to make the update run at regular
intervals.

The following sections show how to set up the client using a simple
example.

## Configure dynamic domain update

Say you want to update "mydomain.com" dynamically. To do so, create a new curl
configuration file for it, as follows (as root):

cd /etc/dns24
    cp template.curl mydomain.curl
    chmod 600 mydomain.curl

This creates a configuration file "mydomain.curl" readable only by root. Edit
the file and fill in the username and password of your DNS24 account, as well
as the domain name you want to update. Test your configuration like this:

# curl --config /etc/dns24/mydomain.curl
    0000 Transaction successful, # affected row(s) = 1

(Alternatively, run "systemctl start dns24@mydomain", then check the status of
the service.)

If you see output similar to what's shown above, the configuration is correct.

## Enable automatic updates

Once you have a working update configuration for a domain, as described above,
you can enable automatic updates for it by running:

systemctl enable --now dns24@mydomain.timer

## Verify updates

You can verify the updated DNS entry in the DNS24 web interface, or by querying
their name servers, like this:

dig @ns1.dns24.ch mydomain.com

To monitor the timed updates, use the standard tools provided by systemd, such
as

systemctl list-timers dns24@*

and

journalctl -u dns24@*

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