Description:

ez-ipupdate is a small utility for updating your host name for any of the
dynamic DNS service offered at:

* http://www.ez-ip.net
* http://www.justlinux.com
* http://www.dhs.org
* http://www.dyndns.org
* http://www.ods.org
* http://gnudip.cheapnet.net (GNUDip)
* http://www.dyn.ca (GNUDip)
* http://www.tzo.com
* http://www.easydns.com
* http://www.dyns.cx
* http://www.hn.org
* http://www.zoneedit.com

it is pure C and works on Linux, *BSD and Solaris.

Don't forget to create your own config file ( in /etc/ez-ipupdate.conf )
You can find some example in /usr/share/doc/ez-ipupdate-3.0.11b8