:'''NOTE:''' You may encounter issues in Fedora 19 /21 with the ddclient not starting. If so, do the following as ''root'' user (refer to [https://bugzilla.redhat.com/show_bug.cgi?id=860310 Red Hat Bugzilla – Bug 860310]):
mkdir /var/run/ddclient
chown ddclient:ddclient /var/run/ddclient