101 lines
2.5 KiB
Markdown
101 lines
2.5 KiB
Markdown
# DDclient
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###### guide-by-example
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# Purpose & Overview
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Automatic DNS entries update.
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* [Official site](https://sourceforge.net/p/ddclient/wiki/usage/)
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* [Github](https://github.com/ddclient/ddclient)
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* [DockerHub](https://hub.docker.com/r/linuxserver/ddclient)
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DDclient is a Perl client used to update dynamic DNS records.</br>
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Very useful if not having a static IP from the ISP.
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It makes sure that if you reset your router, or have a power outage,
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and you get a new public IP assigned, this IP gets automaticly set
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in the DNS records for your domains.
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This setup runs directly on the host machine.</br>
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It works by checking every 10 minutes
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[checkip.dyndns.org](http://checkip.dyndns.org/),
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and if the IP changed from the previous one, it logs in to the DNS provider and
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updates the DNS records.
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# Files and directory structure
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```
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/etc/
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└── ddclient/
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└── ddclient.conf
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```
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# Installation
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Install ddclient from your linux official repos.
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# Configuration
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Official ddclient config example
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[here](https://github.com/ddclient/ddclient/blob/master/sample-etc_ddclient.conf).
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This setup assumes the DNS records are managed on Cloudflare.</br>
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Make sure all subdomains in the config have A-records.
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`ddclient.conf`
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```bash
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daemon=600
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syslog=yes
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mail=root
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mail-failure=root
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pid=/var/run/ddclient.pid
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ssl=yes
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use=web, web=checkip.dyndns.org/, web-skip='IP Address'
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##
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## CloudFlare (www.cloudflare.com)
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##
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protocol=cloudflare, \
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zone=example.com, \
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ttl=1, \
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login=bastard@gmail.com, \
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password=<global-api-key-goes-here> \
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example.com,*.example.com,subdomain.example.com
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##
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protocol=cloudflare, \
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zone=example.org, \
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ttl=1, \
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login=bastard@gmail.com, \
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password=<global-api-key-goes-here> \
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example.org,*.example.org,whatever.example.org
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```
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# Start the service
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`sudo systemctl enable --now ddclient`
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# Troubleshooting
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If it would timeout on start, check the real location of `ddclient.pid`</br>
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`sudo find / -name ddclient.pid`
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If it is correctly set in the `ddclient.conf`.
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# Update
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During host linux packages update.
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# Backup and restore
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#### Backup
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Using [borg](https://github.com/DoTheEvo/selfhosted-apps-docker/tree/master/borg_backup)
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that makes daily snapshot of the /etc directory which contains the config file.
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#### restore
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Replace the content of the config file with the one from the backup.
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