Ez-ipupdate is a quite complete client for the dynamic DNS service offered by http://www.ez-ip.net/ and many more.

Currently supported are: ez-ip (http://www.EZ-IP.Net/), Penguinpowered (http://www.penguinpowered.com/), DHS (http://members.dhs.org/), dynDNS (http://members.dyndns.org/), ODS (http://www.ods.org/), TZO (http://www.tzo.com/), EasyDNS (http://members.easydns.com/), Justlinux (http://www.justlinux.com), Dyns (http://www.dyns.cx), HN (http://dup.hn.org/), ZoneEdit (http://www.zoneedit.com/) and Hurricane Electric's IPv6 Tunnel Broker (http://ipv6tb.he.net/).

All services using GNUDip are also supported.