You can at least disable access to it from remote machines by the
configuration in /etc/cups/cupsd.conf, so that others in the LAN cannot
see your local queues and jobs, or exploit bugs of your CUPS daemon. You
can even close port 631 for users on your local machine by commenting
out the "Port 631" or "Listen localhost:631" line in your cupsd.conf,
but make sure that you have a "Listen /var/run/cups/cups.sock" line, so
that local applications send their print job through this socket.

Do not forget to restart the CUPS daemon ("sudo /etc/init.d/cupsys
restart" or "sudo /etc/init.d/cups restart").

I am closing this bug as it is a configuration issue.


** Changed in: cupsys (Ubuntu)
       Status: New => Invalid

-- 
Option to disable CUPS web-interface
https://bugs.launchpad.net/bugs/239258
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