Access to websites protected by basic authentication which involves user/password window popup, such as apache htaccess style, is broken if antivirus scanning is enabled in http proxy.
turn off hte suspicious sites category and see if hte popups come back.
Already tried that. all categories removed/disabled. Only thing that works is disabling antivirus.
Seemed to be having ftp antivirus issues as well but haven't had a chance to test further.
To double check that it wasn't just a strange one time issue, I tested behind another 8.162 instance at a different location and have the same issue.
I also tested by adding an antivirus exception for this website, with all url filtering disabled, and it immediately starts working so the problem is definitely antivirus, but still no error in the http proxy log to state why
