Patent ID: 11196712

Abstract:
The method and system detects if proxies are used by a user from a web server's side. The method and system uses HTTP/2 and HTTP/3 protocols and, more precisely, the ping frames to test the round trip time of messages between a web server and a user. At the same time, a web server uses an Internet Control Message Protocol echo requests to measure the round trip time to an IP address. A web server can then compare, aggregate, and analyze different round trip times and determine if they are coming from different sources, i.e. if a user is using a proxy server. A web server can make decisions based on the comparison of round trip times. For example, a difference in a single user's round trip times may trigger a restrictive user policy at the web server's end and a web server can decide to return the requested content, return an error message, or ban them and similarly limit services.