Synology DynDNS using Cloudflare API

Note

This script has been tested on a Synology DS218+ running DSM 7.1.1-42962 Update 6

This project is entended to add a DynDNS custom provider for Synology NAS

The genesis 🧠

Synology NAS does not support Cloudflare DNS automatic update (I mean directly via Cloudflare API, it is possible to use DNS-o-matic to automaticly update you DNS record). So I decided to create this little PHP script.

How to

Important

You need to have a SSH access with root privileges to your NAS to perform the following commands

1. Add a new DynDNS providers

cat <<EOF >>/etc.defaults/ddns_provider.conf
[Cloudflare]
        modulepath=/usr/syno/bin/ddns/cloudflare.php
        queryurl=https://api.cloudflare.com/
EOF

2. Create a new PHP script file

vi /usr/syno/bin/ddns/cloudflare.php

And add the content of cloudflare.php

3. Set your Cloudflare zone ID

sed -i 's/__CLOUDFLARE_ZONE_ID__/YOUR_CLOUDFLARE_ZONE_ID/g' /usr/syno/bin/ddns/cloudflare.php

4. Setup your Synology DDNS parameters

Go to Control Panel > Connectivity > External Access > DDNS and Add a new entry

• Service Provider : Cloudflare
• Hostname : A valid domain name (ex: mynas.synology.com)
• Username/Email : The existing Cloudflare DNS record ID
• Password/Key: The Cloudflare API Token with Zone DNS Edit permission

Click on Test Connection and your NAS is ready to automaticly update your public domain name !