[2918] in WWW Security List Archive
Re: information about proxy servers
daemon@ATHENA.MIT.EDU (Ben Camp)
Wed Sep 11 07:16:02 1996
Date: Wed, 11 Sep 1996 03:47:18 -0500
To: Sextl Jonas <jonny@zimt02.dillingen.de>,
Paul Ruijgrok <p.ruijgrok@trendsoft.nl>
From: Ben Camp <benc@geocel.com>
Cc: www-security@ns2.rutgers.edu
Errors-To: owner-www-security@ns2.rutgers.edu
While this is one part of a proxy server, it is more of an implementation
specific feature than what a Proxy Server how a proxy server works.
This description is specific to an HTTP Proxy.
Here is probably the most common proxy configuration:
Client Machine
|
(Firewall)* sometimes
|
Proxy
|
Internet
The client would not have direct access to the internet. The client's
machine connects to the Proxy server, and sends a command like the following:
GET http://www.geocel.com/ HTTP/1.0<CRLF>
OTHER HEADER INFO<CRLF><CRLF>
The proxy is then responsible for connecting to the remote location and
retrieving the document. If the proxy supports caching, then it might send
a cached version of the document. The proxy would act just like the server
it connects to and send the appropriate information back to the client.
Just by the design of many proxies, they do not allow the client to interact
directly with the target server. This breaks things like Server push.
Ben Camp
At 11:52 PM 9/10/96 +0100, Sextl Jonas wrote:
>
>
>On Tue, 10 Sep 1996, Paul Ruijgrok wrote:
>
>Hallo,
>
>> Does anybody know how proxy servers work. Where can I find more
>> information about this topic.
>
>These servers cache the access of WWW-documents on the disk and if
>another request for an cached "object" arrives, it serves the cached
>object from the disk instead of loading it from the web.
>
>One of the best free proxy-servers can be found at
>http://www.nlanr.net/Squid, but also apache has an option to act as a
>proxy server. I think you can find it at http://www.apache.org
>
>>
>> Thanks,
>>
>> Paul Ruijgrok (p.ruijgrok@trendsoft.nl)
>>
>
>Sextl Jonas (jonny@dillingen.de)
>
>
