Dynamic DNS Updates with TSIG and/or ssh for Security
A DSL Line with modem network uses a DHCP server to configure client machines. In most cases, these machines do not run any services, so other machines never want to contact them, and so the lack of a corresponding entry in the domain name service is not a problem.
However, there are times when a machine requires a valid entry in the DNS. Traditionally, DNS has been set up by creating entries - called resource records - in text files called zone files. A typical address record for a host would look like this:
dynamic IN A 188.8.131.52
Read the full article: http://ghadir.cofares.net/dyndns