1. A method for operating a scanning facility executing on processing circuitry, the method comprising: receiving a plurality of client requests for content from a client at the scanning facility, each one of the requests including an outbound network request from the client with a Uniform Resource Identifier (URI) containing a domain name; saving contextual information from the requests at the scanning facility, wherein the contextual information includes a changing character string from a first one of the plurality of requests to a second one of the plurality of requests and wherein the changing character string further includes at least one change to header information for the requests; examining the requests for compliance with a management policy at the scanning facility; retrieving a content item responsive to the request at the scanning facility; and analyzing, with the scanning facility, the contextual information and a corresponding plurality of content items responsive to the plurality of requests to detect whether the plurality of content item includes restricted content from a list of restrictions in the management policy.