dhisd -- DHIS server, meant to update DNS records dynamically.
ftp://ftp.dhis.org/pub/dhis/dhisd-4.0.2.tar.gz
DHIS is a system meant to provide dynamic updates of DNS records for variable IP address states. The current system distribution is composed of three modules, dhisd, the DHIS server, relay, the mail relay server which may or may not be used, and dhid, the DHIS client.