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RE: http proxy & tunnel differences ??

From: Josh Cohen (Exchange) <joshco@Exchange.Microsoft.com>
Date: Tue, 26 Oct 1999 11:41:47 -0700
Message-ID: <BFF90FB6CF66D111BF4F0000F840DB850BCBBCAB@LASSIE>
To: "'Roy T. Fielding'" <fielding@kiwi.ICS.UCI.EDU>, Scott Lawrence <lawrence@agranat.com>
Cc: Vinit Kumar <kumar_vinit@hotmail.com>, http-wg@hplb.hpl.hp.com
> -----Original Message-----
> From: Roy T. Fielding [mailto:fielding@kiwi.ICS.UCI.EDU]
> Sent: Tuesday, October 26, 1999 8:40 AM
> To: Scott Lawrence
> Cc: Vinit Kumar; http-wg@hplb.hpl.hp.com
> Subject: Re: http proxy & tunnel differences ?? 
> >
> >Actually, the client may or may not know about the proxy.
> 
> The client always knows about the proxy -- that is what distinguishes
> a proxy from a gateway.  A "reverse proxy" is a gateway.
>
Actually, for better or worse, the client does not always
know about the proxy.  Transparent proxies are quite common.
Again, for better or worse, mostly worse IMHO :)
 
> >> How does a http tunnel work. Is the initial connection similar ?
> >> Does a client (browser) need to configured differently when
> >> it goes through
> >> a tunnel or is it same as the configuration required when it
> >> goes through
> >> the proxy ? Are there to separate tcp connections for each
> >> request even in a
> >> tunnel ?
> 
> Some tunnels are activated by a proxy request, some are simply
> port forwarding TCP firewalls (either on the client side or the
> server side, or both), and others are gateways to other servers.
> The important thing from HTTP's perspective is that once an
> intermediary becomes a tunnel, it is no longer conscious of the
> HTTP communication -- only of bytes being relayed from one connection
> to another.
> 
> ....Roy
> 
Received on Tuesday, 26 October 1999 19:43:15 EDT

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