asus_ddns.sh wan_start or crontab

asus_ddns.sh

#!/bin/sh

server=`nvram get ddns_server_x`
hostname=`nvram get ddns_hostname_x`
wanip=`nvram get wan0_ipaddr`
wanoldip=`nvram get wan0_realip_ip`
nasserver="nwsrv-ns1.asus.com"
postexe="/sbin/ddns_updated"
cachefile="/tmp/ddns.cache"

#get real ip
getrealip.sh >& /dev/null

wanip=`nvram get wan0_realip_ip`


echo wanip: $wanip
echo hostname: $hostname

if [ "$1" != "" ] || [ "$wanoldip" != "$wanip" ]
then
    if [ "$server" == "WWW.ASUS.COM" ]
    then
        ez-ipupdate -S "dyndns" -a $wanip -h $hostname -A 2 -s $nasserver -e $postexe -b $cachefile
    fi
fi