DDclient is a small but full featured Perl client used to update dynamic DNS entries for accounts on Dynamic DNS Network Services free DNS service. It has the capability to update more than only dyndns and it can fetch your WAN-ipaddress on a few different ways. Supported features include: operating as a daemon, manual and automatic updates, static and dynamic updates, optimized updates for multiple addresses, MX, wildcards, abuse avoidance, retrying failed updates, and sending update status to syslog and through e-mail.