System and method for suppressing DNS requests
A virtual private router (VPR) intercepts DNS requests and returns a pseudo IP address to the requesting application and the pseudo IP address is mapped to a domain name in the request. Requests for content including the pseudo IP address are modified to include the corresponding domain name and transmitted to an intermediary server, which resolves the domain name to a real IP address and forwards the content request. The content is received by the intermediary server, which returns it to the requesting application, such as by way of the VPR. Real IP addresses may be returned by the intermediary server such that subsequent content requests to the domain name may bypass the intermediary server. Requests for certain domains, ports, and/or protocols may bypass the intermediary server such that the VPR resolves the domain names to real IP addresses.
1. A method for domain resolution suppression, the method comprising:
intercepting, from an application executing on a computing device by a module executing on the computing device, a content request including a pseudo IP address;
in response to intercepting from the application by the module the content request including the pseudo IP address, generating a modified content request including a domain name mapped to the pseudo IP address in an entry of a first data table;
transmitting, by the computing device, the modified content request to a first server;
receiving, by the computing device, a response to the modified content request, the response including a routable IP address corresponding to the domain name; and
storing, by the computing device, the IP address and domain name in a second data table;
intercepting from the application by the module, a domain resolution request including the domain name, the domain resolution request addressed to one of the first server and a third server;
suppressing, by the module, transmission of the domain resolution request;
returning, by the module to the application, the pseudo IP address as a response to the domain resolution request;
storing, by the module, in the first data table the entry mapping the pseudo IP address to the domain name of the domain resolution request;
wherein returning, by the module to the application, the pseudo internet protocol (IP) address as a response to the domain resolution request comprises returning the pseudo IP address having a time to live (TTL) attribute set to a value larger than a TTL value used for the routable IP address.
2. The method of claim 1 , further comprising:
detecting, by the computing device, a second content request from the application, the second content request including the domain name;
In response to detecting the second content request from the application, the second content request including the domain name, retrieving, by the computing device, the routable IP address from the second data table; and
transmitting, by the computing device, the second content request including the routable IP address to one of the first server and a second server addressed by the routable IP address.
3. The method of claim 1 , comprising transmitting, by the computing device, the second content request to the second server addressed by the routable IP address thereby bypassing the first server.