dape

#!/bin/bash
DOMAIN="example.com"
PASSWORD="PASS"
online_ipv6=`curl -6 -s http://checkip.dns.he.net | grep -o -E '([A-Fa-f0-9]{1,4}:){7}[A-Fa-f0-9]{1,4}'`
dns_ipv6=`host -t AAAA $DOMAIN ns4.he.net | grep -o -E '([A-Fa-f0-9]{1,4}:){7}[A-Fa-f0-9]{1,4}'`

if [ "$online_ipv6" != "$dns_ipv6" ]
   then
	echo `date` "- registering" $online_ipv6 "at dns.he.net." >> /var/log/dns.he.net.log
	curl -s -6 "http://$DOMAIN:$PASSWORD@dyn.dns.he.net/nic/update?hostname=$DOMAIN"
fi

echo `date` "- checked" $dns_ipv6 "with dns.he.net." >> /var/log/dns.he.net.log

online_ipv4=`curl -4 -s http://checkip.dns.he.net | grep -o -E '([0-9]{1,3}\.){3}[0-9]{1,3}'`
dns_ipv4=`host -t A $DOMAIN ns4.he.net | grep -o -E '([0-9]{1,3}\.){3}[0-9]{1,3}'`

if [ "$online_ipv4" != "$dns_ipv4" ]
   then
    echo `date` "- registering" $online_ipv4 "at dns.he.net." >> /var/log/dns.he.net.log
    curl -s -4 "http://$DOMAIN:$PASSWORD@dyn.dns.he.net/nic/update?hostname=$DOMAIN"
   fi

echo `date` "- checked" $dns_ipv4 "with dns.he.net." >> /var/log/dns.he.net.log