DSM-G600, DNS-3xx and NSA-220 Hack Forum

#!/bin/ffp/sh

# Username and password of Dyndns account
USERNAME=user
PASSWORD=pass

# dynamic domain
DYNDOMAIN=mydomain.dyndns.com

while[ true ] ; do
    
    # ask current address at dyndns.org
    LOOKUP=` nslookup $DYNDOMAIN 204.13.248.116 | tail -n 1 | awk '{print $3}' `

    # ask current address at whatismyip.com
    cd /tmp
    wget -q http://www.whatismyip.com/automation/n09230945.asp
    
    if[ -f n09230945.asp ] ; then
        # we have answer of whatismyip.com
        MYIP=` cat n09230945.asp `
        rm n09230945.asp

        if [ "$LOOKUP" = "$MYIP" ]; then
            echo "Address is unchanged"
        else
            echo "Address is changed from $LOOKUP to $MYIP, going to update"
            echo ` wget --user=${USERNAME} --password=${PASSWORD} "http://members.dyndns.org:8245/nic/update?system=dyndns&hostname=${DYNDOMAIN}&myip=${MYIP}&wildcard=off" `
        fi
    else
        echo "Whatismyip.com is offline"
    fi

    sleep 300
done