Patent ID: 7747780

Claim:
A method comprising the steps of: receiving a request from a network device, said request including an IP address of said network device; generating a domain name for locating a device configured to process a DNS query, said domain name corresponding to said IP address; sending said domain name to said network device; generating and sending a DNS query including said domain name and at least one local DNS setting of said network device from said network device to said device configured to process said DNS query; processing an association between said IP address and said at least one local DNS setting of said network device; 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; and notifying said network device that said at least one of a current device IP address and current local DNS setting may be at risk when it is determined that there is no match in said table.