Thanks so far Henrik. Since I´m a very stubborn person, I´m still trying. Doing some further research, I found a post in squid list from 3 years ago (in fact, you answered to it that time) where a user said he changed squid so it would return to the browser a HTTP_UNAUTHORIZED (401) message and then a WWW-Authenticate response-header. Did some work with Wireshark, and also found some old Squid docs, that showed me that Squid already does the HTTP_UNAUTHORIZED part. Back then the person said it worked for Mozilla and Firefox, but not for IE. Even you said backthen that it wouldn´t always work. Even so, I´d like to give it a try. Anyone knows if this change in Squid so it replies with WWW-Authenticate is something done in the config file or the source code? Even if it doesn´t work, I think is a very useful thing to learn. For the record: the thread I´m based on is: http://www.squid-cache.org/mail-archive/squid-users/200505/0404.html (original thread) http://www.squid-cache.org/mail-archive/squid-users/200505/0411.html (answer) Thanks again 2008/6/12 Henrik Nordstrom <henrik@xxxxxxxxxxxxxxxxxxx>: > On tor, 2008-06-12 at 17:22 -0300, Henrique Machado wrote: > >> I checked on that. You´re right, sorry about that. But the FTP still >> opens as read-only. Any ideas? > > File a bug report with your browser vendor, it's a known shortcoming of > current browsers. > > Netscape 3 did support uploads via HTTP proxies. > > MSIE has never supported it. > > Firefox has forgotten how to do it.. > > Regards > Henrik >