A script to update a cloudflare DNS record with your current IP

cloudflare_ddns.sh

#!/bin/bash

auth_email='YOUR_EMAIL'
auth_key='YOUR_API_KEY'

zone_id='YOUR_ZONE_ID'
#you must create the record before using this script
record_id='YOUR_RECORD_ID'
host_name='YOUR_HOST_NAME'

ip4=$(curl -4 --connect-timeout 2 https://icanhazip.com/ 2>/dev/null)
ip6=$(curl -6 --connect-timeout 2 https://icanhazip.com/ 2>/dev/null)

if [[ -n "$ip4" ]]; then
	curl -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$record_id" \
		-H "X-Auth-Email: $auth_email" \
		-H "X-Auth-Key: $auth_key" \
		-H "Content-Type: application/json" \
		--data "{\"type\":\"A\",\"name\":\"$host_name\",\"content\":\"$ip4\",\"ttl\":120,\"proxied\":false}"
fi


if [[ -n "$ip6" ]]; then
	curl -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$record_id" \
		-H "X-Auth-Email: $auth_email" \
		-H "X-Auth-Key: $auth_key" \
		-H "Content-Type: application/json" \
		--data "{\"type\":\"AAAA\",\"name\":\"$host_name\",\"content\":\"$ip6\",\"ttl\":120,\"proxied\":false}"
fi