DNS Module for AOLserver is a module that implements a DNS server and proxy. It can serve from its own database or perform forwarding to another DNS server and cache results. The server doesn't support a database directly, instead it provides commands similar to 'route add|del' to add and remove DNS records to/from memory cache.
tzoperl is a Perl Client-Daemon for TZO DDNS Services. The service works with dial-up, DSL, Cable Modems, ISDN, and most types of connections that get you connected to the Internet. TZO gives you a domain which will point to your machine to make it easier to run services on your machine. TZO also has a specialized mail store and forward service that will hold all mail for your domain/s if you go offline for a while.