Today i took some time to upgrade and enhance our student printing functionalities. As i checked the usual printer queues i noticed that cups was suddenly listing a lot of new printers that were not even on our network. Tracing the error lead to a Mac book on the student network that was running a cups daemon with gimp-print drivers.
Quite odd that a Mac OS X based cups deamon is broadcasting printers to another cups server without checking if the printers are actually availabe.
Ill try to find out more scenarios in which a cups server will include shared printers from another printer deamons.
Disabling the printer search
Browsing off
in /etc/cups/cupsd.conf will disable this feature