Re: Question about HTTP/1.1 and proxy servers

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> As I don't seem to get any answer to my question within the usenet,
> you might be able to help me here.
> 
> Is there any way, on the server side, to identify if a request
> originated by an http client has passed through a proxy ? Is there
> anything that a proxy changes within the HTTP request/header before
> forwarding it that could be used ?

Yes, but depending on the version of the proxy server software, this
information may be in different places.  Here are the possibilities:

	- "Via:" header (HTTP/1.1)
	- "Forwarded:" header (some HTTP/1.0 implementations)
	- "User-Agent: ... via <proxy-software>" (CERN proxy)

Cheers,
--
Ari Luotonen, Mail-Stop MV-061		Opinions my own, not Netscape's.
Netscape Communications Corp.		ari@netscape.com
501 East Middlefield Road		http://people.netscape.com/ari/
Mountain View, CA 94043, USA		Netscape Proxy Server Development

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