Thank you Alex. This is helpful. Sent from my iPhone > On 07-Jul-2014, at 8:15 pm, Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > >> On 07/07/2014 06:58 AM, Vinay C wrote: >> >> Is there any way I can detect which Proxy server (Preferably name like >> Squid, Websense etc) did my http-request passes through (Either at >> webserver side or at request initiating client side)? > > > If the proxy adds a Via header identifying the proxy product name, then > you can easily identify such a proxy by looking at the request or > response forwarded by the proxy. FWIW, Squid adds a Via header with > Squid name by default. > > If the proxy does not add a Via header, then it may still be possible to > detect and identify it, especially if you control both the client and > the origin server. However, detection and especially identification in > such environment may require sending probing messages and using > imprecise AI techniques "fingerprint" proxy behavior. Your program would > then search for that fingerprint in the fingerprint database of known > proxies. I am not aware of any such ready-to-use programs or databases, > but they may exist. > > Please note that a single message may pass through several proxies, > complicating the matters further. > > The above applies to regular forwarding, reverse, and so called > "transparent" HTTP proxies as well as their combination. > > > HTH, > > Alex. >
