From Dynu Systems:
Dynu Basic Dynamic DNS Client uses true dynamic DNS client/server technology to fix a static domain name to a dynamic IP address. This allows Internet users with modems to host Web, FTP, mail and game servers, or other TCP/IP services from a home PC. Dynu Basic Dynamic DNS Client works with remote control applications such as VNC, videophone applications, and Internet phones, as well as popular Web, FTP, and mail servers like Apache and Sendmail. Features include MX record and URL forwarding also.