This included dhcpcd client doesn't correctly register the hostname with the DDNS server. As a result when adding a Linux box to a Windows NT/2000 domain you are left adding a static IP to the box and entering the hostname into the DNS manually.... a pain in the butt if you have more than 400 machines.
Apologies for the unresponsiveness of the previous dhcpcd packager... The DHCP server (*) is responsible for registering with DDNS, not the client. (**) (*) As of RHL 7.1, the DHCP server included did not support DDNS registration. The latest upstream release does have this and may be included in a future version of RHL.. (**) Some broadband ISPs provide separate programs that register a dynamically assigned IP to the user's preferred hostname, subject to authentication by that user.