ISPMan is a system to design massive ISPs using LDAP as the backend.
ISPMan provides a web front end and a command line interface to create virtual domains and manages users, dns information, email infos and httpd setup data for these vhosts.
Webinterface written in php for ISC bind and ISC dhcp configuration and administration. It keeps it's own database containing general dns and dhcp information and information about subnets, hosts etc.
Configures DNS, DHCP, firewalls, RADIUS servers..