I have installed free Sophos UTM for a small business.
We configured Firefox to use the Sophost UTM as a web proxy (under Preferences -> Advanced -> Network -> Settings -> Manual Proxy Configuration).
When a user browses the net, a popup prompts for a logon. After user authenticates with the right credentials the same popup appears again. A user re-authenticate or cancel, either option works (most users cancel).
After browsing for a bit, the popup will appear again asking for authentication, which again the user can just cancel.
Is there a specific reason why the login popup appears twice at first and random afterwards?
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