And are there providers that fare better or worse under this stress test. When you go to whatismyproxy.com and see this: The HTTP_CACHE_CONTROL header exists, and is non zero. This may indicate a caching proxy. HTTP/1.0 protocol does not include the HOST header, but we have received one. This indicates a proxy server receiving a HTTP/1.1 header from you and passing it on, while claiming only HTTP/1.0 for itself. You have no reverse DNS entry. This may have been intentionally left blank as a concealment tactic.