he.net ddns auto update

dns.he.net.sh

#!/bin/bash
nic="eth0"
export LastIP=`/bin/cat /var/log/ipv6addr`
export NowIP=`ip -o  -6 addr show dev $nic scope global |head -n 1 | /bin/sed -e's/^.*inet6 \([^ ]*\)\/.*$/\1/;t;d'`

password="you password"
hostname="nas.d.youdomain.com"

if [ -z "$NowIP" ]
then
        echo `date` 没有 IPV6 ！退出!>> /var/log/dns.he.log
        exit
fi
if [ "$NowIP" != "$LastIP" ]
then
        echo -n "$NowIP" > /var/log/ipv6addr
        echo `date` "IP 改变，更新 Dns..." >> /var/log/dns.he.log
        echo -n `date` [  >> /var/log/dns.he.log
        # 下面一行代码是更新 dns，请根据自己情况修改
        curl -6 --interface ${nic} -k "https://dyn.dns.he.net/nic/update" -d "hostname=${hostname}" -d "password=${password}" >> /var/log/dns.he.log
        echo ] >> /var/log/dns.he.log
else
        echo `date` "IP 没有变化..." >> /var/log/dns.he.log
fi