Babelo Gmvsdm:
I don't think so, see the screen capture there: http://img146.imageshack.us/img146/4946/squid.jpg In black my whole IP. In red my squid server name. in blue the port used by squid.
That was detected via the response headers like "via" IMO.But, there are many ways to detect a proxy, it's not easy really to hide a proxy.
-- Jeff Pang DingTong Technology www.dtonenetworks.com