I am trying to suppress network printers showing up under Settings/Devices/Printers on my Ubuntu 17.10 (Gnome) desktop. It's my desktop in my office and all the printers in this building appear under Settings/Devices/Printers.
I have edited /etc/cups/cups-browsed.conf as:
BrowseRemoteProtocols none BrowseLocalProtocols none BrowseProtocols none
and restarted the service.
$ sudo service cups-browsed restart
But if I go to settings/Devices/Printers, I still see all the network printers. Same even if I log out and then log in, or restart the system. But it is not that the modification to the cups-browsed.conf file is reset on reboot.
If I manually remove the printers from the Settings/Devices/Printers list (by clicking the gear button next to the "No Active Jobs" and Remove Printer), they are removed but come back on my next visit to the Printers tab. I think it is not intended that the "remove" operation is effective only while I stay inside the tab.
If I stop the cups-browsed as:
$ sudo service cups-browsed stop or $ sudo systemctl disable cups-browsed
Settings crashes and on re-opening the Settings/Devices/Printers tab, all the printers are again there.
For your information, there is only one printer visible in http://localhost:631/printers/ or in some of the printing dialogs. However, for example, the printing dialog in Chrome would show me tens of network printers.
How can I stop the system searching for network printers everytime I open Settings/Devices/Printers, or a printing dialog in Chrome?