Cloudflare Dynamic DNS Update Service

• POSIX-compliant
• Cloudflare API v4
• Bearer authentication
• DNS proxy recognition
• Installed as a cron job
• Compatible with OpenBSD

Install

1. Create /etc/ddns/cloudflare.keys with contents:

ZONE_ID=xxxxxx
API_TOKEN=xxxxxx

2. Set the owner and file /etc/ddns/cloudflare.keys only readable by the executor of the ddns service

3. Copy ddns to a directory of your choice, e.g., /usr/sbin/

4. Add a cron job using crontab -e under the service executor/user:

*/10 * * * * /usr/sbin/ddns

Requirement

• curl
• jq

Design Consideration

No Python. Python 3.10 drops support for LibreSSL, thus not working on OpenBSD.