I've got a web proxy configured in standard mode, and using Active Directory SSO authentication. The proxy is scanning the HTTPS traffic, rather than just checking the URLs. This works fine, apart from one small issue. Every now and again, Firefox users get a pop-up which asks for credentials. The pop-up shows the message:
The proxy moz-proxy://[firewall name]:8080 is requesting a user name and password. The site says: "moz-proxy://[firewall name]:8080"
(where [firewall name] is the host name of the UTM server). This doesn't happen in any of the other browsers I have tried: IE11, Chrome, Opera.
I've been able to reproduce this issue by visiting certain sites that uses the Disqus commenting system (although not all Disqus-using sites cause the issue); examples given below:
Android Community - Tracking the Android Platform
SlashGear - Feeding Your Gadget and Tech Obsessions
The Telegraph - Telegraph online, Daily Telegraph, Sunday Telegraph - Telegraph
If I follow a link to one of the stories, and it contains Disqus comments, I see the pop-up. Cancelling the request doesn’t seem to cause a problem, so this is more of a nuisance than a show-stopper. But are we the only people seeing this issue? I'm going to raise this with our reseller, but I'd be interested to know whether this is an issue/bug in the proxy, or if I've just missed a setting in the proxy configuration, or whether it's a Firefox issue (V39.0.3 at the moment).
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