Dynamic dns ( dyndns ) and internet domain name :

The dynamic dns service allows people who have high speed internet connexion at home like dsl , optical connexion or other permanent connexion to install and use internet server application at home without requiring an internet hosting provider.

An internet domain name is an unique name in the world that identifies your server machine. Every one who would like to connect to your application, must introduce the internet domain name as an unique address. Each domain name has an internet address called ip assigned by your internet service provider. This ip is usually a dynamic address ( dynamic ip ) or not a fixed ip which changes every 24 hours or less.

Reaching an internet application server from an other place is not possible because the ip assigned to the domain name changes. When a user would like to visit a domain name, the network connector in the operating system try to ask a dns server of the isp to get the ip of this domain. The dns server will respond by a false ip ( an old assigned ip ) because the ip was changed.

There fore, your domain could not be reached. Th solution is to install a toolkit able to connect to the dns server and send to it iformation aout the actual internet address. The dns server is called then a dynamic dns server. In this case, your web server or your ftp sever could be reached because the dynamic dns server will update your ip in its database and queries sent to the dns will be responded by a true ip.

The dynamic dns server allows you then to host your web site, your internet camera in your desktop.

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