Printer Sharing Check on Linux: Free

Printer sharing is off

Check printer sharing status

Most Linux systems use CUPS (Common Unix Printing System) for printer management:

systemctl status cups

GNOME (Ubuntu, Fedora)

Check and disable printer sharing in Settings:

Open Settings
Navigate to Printers
Click the menu button (three dots)
Select Sharing
Ensure Printer Sharing is turned off

KDE Plasma

Manage printer sharing through System Settings:

Open System Settings
Go to Hardware → Printers
Configure printers to not be shared on the network

Command Line (CUPS configuration)

Check CUPS sharing configuration:

sudo grep -i sharing /etc/cups/cupsd.conf

Edit CUPS configuration to disable sharing:

sudo nano /etc/cups/cupsd.conf

Ensure these settings in the configuration:

# Disable printer sharing
Browsing Off
BrowseLocalProtocols none

# Restrict access to localhost only
Listen localhost:631
Listen /run/cups/cups.sock

Restart CUPS service after changes:

sudo systemctl restart cups

Disable CUPS entirely (if no printers needed)

If you don't use printers, you can disable the CUPS service completely:

sudo systemctl stop cups
sudo systemctl disable cups

Verify settings

Check that printer sharing is disabled:

# Check if CUPS web interface is accessible only locally
curl -s http://localhost:631 | grep -i cups

# Verify no printer broadcasts on network
avahi-browse -at | grep -i printer

When to enable printer sharing

Printer sharing can be temporarily enabled when you need to share a printer with other devices on your trusted network. Remember to disable it again when finished.

Alternative solutions

Consider using network-attached printers or print servers instead of sharing printers directly from workstations. This provides better security and centralized management.