unwanted password prompt pops up on web server?

Posted by Paul on Server Fault See other posts from Server Fault or by Paul
Published on 2010-03-16T12:13:49Z Indexed on 2010/03/16 12:16 UTC
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iis7

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password

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prompt

my web server randomly asks for a password as though basic authentication is turned on. It's an IIS 7 web server and you have to specifically install basic authentication in the roles section. It isn't installed.

The message that pops up is "Warning: This server is requesting that your username and password be sent in an insecure manner (basic authentication without a secure connection)"

I cannot reproduce the problem but a number of customers have reported the problem and it only seems to appear to a small number of customers.

It pops up when they visit the homepage, nothing is generated by the IIS logs to indicate a password box is being served (e.g. no 401 errors etc)

Can anyone offer any advice?

Thanks

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