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Re: How to tell if it is a true proxy

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On 28/06/2013 5:15 a.m., Geary, Brian W. wrote:
I was wondering if there was a way to test if a proxy was a "true" proxy.

I have been told there is a filter proxy and a true proxy. The difference being that
the true proxy is more secure. I have been told that a true proxy has a barrier of some
sort or protocol shift within the proxy.

[b]True proxy[/b]:  browser->proxy  [barrier or protocol shift]    proxy->remote site connection
[b]Filter proxy[/b]: browser->proxy  --  proxy->remote site connection

Thanks
Brian
HTTP defines proxies in the role of gateway (between protocols or 
networks - ie Squid when using FTP/Gopher/WAIS backends or IPv4/IPv6 
mapping), transforming (alters the payload content ie Squid with 
ICAP/eCAP features enabled), and transparent (does not alter the HTTP 
headers or payload beyond RFC mandatory changes - ie Squid default 
installation). Reverse proxies and interception proxies are not defined 
specifically.
Telling them apart without knowing the proxy configuration file content 
is very difficult. You have to recover the headers sent by the client 
and received by the server to compare and see what was changed (if 
anything).
Amos





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