cloudflare ddns

cf-ddns.sh

#!/bin/sh
# modified by jfro from http://www.cnysupport.com/index.php/linode-dynamic-dns-ddns-update-script
# Uses curl to be compatible with machines that don't have wget by default
# modified by Ross Hosman for use with cloudflare.

cfkey=
cfuser=
cfhost=

WAN_IP=`curl -s http://ip.skafari.com`
if [ -f $HOME/.wan_ip-cf.txt ]; then
        OLD_WAN_IP=`cat $HOME/.wan_ip-cf.txt`
else
        echo "No file, need IP"
        OLD_WAN_IP=""
fi

if [ "$WAN_IP" = "$OLD_WAN_IP" ]; then
        echo "IP Unchanged"
else
        echo $WAN_IP > $HOME/.wan_ip-cf.txt
        echo "Updating DNS to $WAN_IP"
  curl -s https://www.cloudflare.com/api.html?a=DIUP\&hosts="$cfhost"\&u="$cfuser"\&tkn="$cfkey"\&ip="$WAN_IP" > /dev/null
fi