System and method for controlling a dns request

A computer system for controlling communication, e.g. for providing parental control, the system comprising an appliance (2), such as a computer, having a first computer program (3), such as a web browser and referred to as an “issuing program”, which program is suitable for issuing a request to access a domain name on the basis of which a request, referred to as a “DNS request”, is generated to resolve the domain name, said appliance (2) also having a second computer program (1), referred to as a “control program”, and enabling said DNS request to be intercepted;

• the system being characterized in that said control program (1) comprises:
• communications means (11) for communicating with a domain name resolution server (4), referred to as a “DNS server”, which means are configured to transmit said DNS request to said DNS server (4), and to receive from said DNS server (4) a response, referred to as a “DNS response”, having the digital Internet address, referred to as an “IP address”, corresponding to the requested domain name;
• communications means (12) for communicating with another server (5), referred to as an “authorization server” and distinct from said DNS server (4), which means are configured to send to said authorization server (5) an authorization request that is distinct from the DNS request and that includes both an identifier (ID) of the user of the appliance and the domain name for which resolution has been requested, and to receive a response from said authorization server (5) generated as a function of the identifier (ID) of the user of the appliance and as a function of the domain name contained in the authorization request;
• and
• communications means (13) for communicating with said issuing program (3), which means are configured to transmit to said issuing program (3) an IP address that is defined as a function of the response generated by the authorization server (5).