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CloudFlare Dynamic DNS
#!/bin/sh
WAN_IP=`curl ifconfig.io/ip`
OLD_WAN_IP=`cat /var/CURRENT_WAN_IP.txt`
if [ "$WAN_IP" = "$OLD_WAN_IP" ]
then
echo "IP Unchanged"
else
curl https://www.cloudflare.com/api_json.html \
-d 'a=rec_edit' \
-d 'tkn=8afbe6dea02407989af4dd4c97bb6e25' \
-d 'email=sample@example.com' \
-d 'z=example.com' \
-d 'id=9001' \
-d 'type=A' \
-d 'name=sub' \
-d 'ttl=1' \
-d "content=$WAN_IP"
echo $WAN_IP > /var/CURRENT_WAN_IP.txt
fi
@pboertje

Thanks! This is working for me!

@windrof123

Thanks.

@andreisusanu

When ifconfig.io/ip will not be available, the script will go wild. You need to make sure that ifconfig.io/ip returns a proper IP address (maybe by using a regex), and only then update check if is new and proceed by updating the new IP.

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