Cloudflare dynamic dns (dyndns) update script

cloudflare.service

[Unit]
Description=Update Cloudflare IP periodically.

[Service]
Type=oneshot
ExecStart=/usr/local/bin/cloudflare.sh

cloudflare.sh

#!/bin/sh

# Get Token with DNS EDIT Permission for needed zone. This can also be limited to the domain.
TOKEN="CLOUDFLARE API TOKEN"
ZONE="ZONE ID"
RECORD="RECORD ID"
DOMAIN="example.com"

# Get current IP
IPADDR=$(curl -s -4 ifconfig.me)
echo "Updating IP to $IPADDR"

## Use the commented part to get initial RECORD ID after creating the needed A entry in cloudflare.
# curl -X GET "https://api.cloudflare.com/client/v4/zones/$ZONE/dns_records?type=A&name=$DOMAIN&page=1&per_page=20&order=type&direction=desc&match=all" \
#      -H "Authorization: Bearer $TOKEN" \
#      -H "Content-Type: application/json"

curl -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONE/dns_records/$RECORD" \
     -H "Authorization: Bearer $TOKEN" \
     -H "Content-Type: application/json" \
     --data "{\"type\":\"A\",\"name\":\"$DOMAIN\",\"content\":\"$IPADDR\",\"ttl\":1,\"proxied\":false}"

cloudflare.timer

[Unit]
Description=Update cloudflare IP periodically.

[Timer]
OnActiveSec=1min
OnUnitActiveSec=15min

[Install]
WantedBy=timers.target