Method, system, and apparatus for discovering user agent DNS settings

A method comprising:

• receiving a first request for a first content from a second network device, said first request including a first domain name for locating a first network device and an IP address of said second network device;
• generating a second content including a second domain name for locating a domain name server, said second domain name corresponding to said IP address and said first domain name;
• sending said first content and said second content to said second network device;
• generating a second request including said second domain name and at least one local DNS setting of said second network device;
• said second network device sending said second request to a domain name server;
• and
• said domain name server storing an association between said IP address and said at least one local DNS setting of said second network device;
• and
• determining whether at least one of a current device IP address and current local DNA setting matches to a table of previously stored associations of approved prior IP addresses and prior local DNA settings.

A system comprising the following:

• a domain name server configured to store an association between an IP address and at least one domain name system (DNS) setting of a network device;
• and
• a content server in operative association with said domain name server, said content server configured to:
• receive a first request for a first content from said network device, said first request including a first domain name to locate said content server and said IP address of said network device;
• to generate a second content including a second domain name to locate said domain name server, said second domain name corresponding to said IP address and said first domain name;
• to send said first content and said second content to said network device, said network device being configured to generate a second request including said second domain name and said at least one DNS setting, and send said second request to said domain name server;
• and
• to determine whether at least one of a current device IP address and current local DNS setting matches to a table of previously stored associations of approved prior IP addresses and prior local DNS settings.

A computer program product comprising computer readable program code stored on a non-transitory computer readable medium, the program code adapted to execute a method, said method including:

• a first network device receiving a first request from a second network device, said first request including an IP address of said second network device, said first network device generating and sending a content to said second network device, said content including a domain name for locating a domain name server, said domain name corresponding to said IP address,
• said second network device generating and sending a second request to said domain name server, said second request including said domain name and at least one domain name system (DNS) setting of said second network device,
• said domain name server storing or forwarding an association between said IP address and said at least one DNS setting;
• and
• determining whether at least one of a current device IP address and current local DNS setting matches to a table of previously stored associations of approved prior IP addresses and prior local DNS settings.