pkg://ez-ipupdate-3.0.11b8-2mdk.ppc.rpm:49793/HEADER  downloads

Name        : ez-ipupdate                  Relocations: (not relocateable)
Version     : 3.0.11b8                          Vendor: MandrakeSoft
Release     : 2mdk                          Build Date: Mon Dec 15 00:58:07 2003
Install date: (not installed)               Build Host: orion.nanardon
Group       : Networking/Other              Source RPM: ez-ipupdate-3.0.11b8-2mdk.src.rpm
Size        : 98411                            License: GPL
Packager    : Olivier Thauvin <thauvin@aerov.jussieu.fr>
URL         : http://www.gusnet.cx:8080/proj/ez-ipupdate/
Summary     : Client for Dynamic DNS Services
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