[WEB SECURITY] automatically detecting transparent web proxies

Michal Zalewski lcamtuf at coredump.cx
Tue Feb 8 12:16:34 EST 2011

> Hey anyone got ideas on how to automatically detect transparent web
> proxies?

Depends on how they happen to be implemented, but in most cases, they
are not trying to be very stealthy, and you can just try connecting to
a host that is not listening on 80/tcp. If this succeeds, you probably
have a proxy in the way.


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