Squid - client not prompted for user/password
To clarify this is not an issue of authenticating to the Squid proxy - that part works fine.
On one specific site that requires username and password (http, not https), we get "You are not authorized to view this page" when accessing it over Squid. But accessing that same site directly, we get prompted for username and password, and can log in. It's the same situation when using IE or Firefox on Windows, or Iceweasel on Debian.
Below is the full output of the 'not authorized' page.
Otherwise Squid works very well, so any help would is greatly appreciated.
You are not authorized to view this page
You do not have permission to view this directory or page using the credentials you supplied.
Please try the following:
* Click the Refresh button to try again with different credentials.
* If you believe you should be able to view this directory or page, please contact the Web site administrator by using the e-mail address or phone number listed on the 220.127.116.11 home page.
HTTP 401.2 - Unauthorized: Logon failed due to server configuration
Internet Information Services
Technical Information (for support personnel)
This is usually caused by a server-side script not sending the proper WWW-Authenticate header field. Using Active Server Pages scripting this is done by using the AddHeader method of the Response object to request that the client use a certain authentication method to access the resource.