Public bug reported:

I use cups on a print server so I configure cups remote through the web
front-end. If I set security as low as possible (BrowseAllow All, Allow
>From All for all other sections and AuthType and AuthClass disabled) I
have no problem. I can do (printer is already installed): manage
printers --> modify printer --> continue --> continue  --> continue -->
On the Make/Manufacturer page I want to change the driver so I select
the make,  continue --> and I get on the page Model/Driver and so on.
But when I enhance security with  AuthType and AuthClass in cupsd.conf
on the sections /admin and /admin/conf, the cups website works as
follows: manage printers --> modify printer --> Error page with
notification that the page will switch to https --> authentication:
username, password, OK --> continue --> continue  --> continue --> On
the Make/Manufacturer page I want to change the driver so I select the
make,  continue --> I get an wait for .... and after several minutes I
get a white firefox page. This is a bug.

This is my problem investigation: I saw when cups changed to https that
my FQDN was missing the root domain (my FQDN is <server>.local.lan) Cups
HTTPS redirected me to <server>.local (I will mention this in an other
bug report). After disabling avahi-daemon cups HTTPS redirected me to
the IP of the server but I still have the same bug. So I tried system-
config-printer to configure cups remotely. Goto server --> cups server,
username, require encryption connect --> password, OK --> select
printer, on line make and model change --> select printer from database,
forward, select model and different driver, forward --> use the new PPD,
Apply. Everything is OK, so there is no security problem.

I use 8.04-1 jeos on KVM for the print server
package cupsys:
  Installed: 1.3.7-1ubuntu3.1
  Candidate: 1.3.7-1ubuntu3.1
  Version table:
 *** 1.3.7-1ubuntu3.1 0
        500 http://nl.archive.ubuntu.com hardy-updates/main Packages
        500 http://security.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     1.3.7-1ubuntu3 0
        500 http://nl.archive.ubuntu.com hardy/main Packages

** Affects: cups (Ubuntu)
     Importance: Undecided
         Status: New

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cups webpage waits for ever on modify printer make, if authtype is enabled 
https://bugs.launchpad.net/bugs/300822
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