[geeks] Transparent proxies

[Jonathan C. Patschke]

On 18 Sep 2002, Ryan wrote:

> Anyone know of a method to detect transparent proxies between
> a source node and a destination web server? From reading through
> Web Protocols and Practices, it looks as if a proxy is not allowed
> (Via RFC) to modify the majority of the HTTP header fields.

HTTP 1.1-compliant proxies should add a "Via:" header for you to inspect.
However, if you're talking about NAT proxies, I don't believe you'll be
able to check in any portable manner.

-- 
Jonathan Patschke
   > Can you SysAdmins tell me what might go on in a typical day?
   Hours of endless frustration punctuated by moments of sheer terror.
                                 --Saul Tannenbaum (in the Monastery)