From WikiPaul - Paul Swanson's wiki
$ cat /etc/resolv.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
$ cat /etc/apt/sources.list.d/uaf.list
deb http://ubuntu.cs.uaf.edu/ubuntu/ gutsy main universe multiverse restricted
deb-src http://ubuntu.cs.uaf.edu/ubuntu/ gutsy main universe multiverse restricted
deb http://ubuntu.cs.uaf.edu/ubuntu gutsy-backports main restricted universe multiverse
deb-src http://ubuntu.cs.uaf.edu/ubuntu gutsy-backports main restricted universe multiverse
$ cat /etc/ddclient.conf
pid=/var/run/ddclient.pid
protocol=dyndns2
use=web
server=members.dyndns.org
login=UserName
password='thepassword!'
yourdomain.adyndnsserver.com