November 26, 2015

Sharing Linux Printers Across Multiple Subnets

Configuring CUPS For Two Subnets

  • November 25, 2008
  • By Carla Schroder

All you need to make this work are a central Linux/CUPS printer server, and one Linux PC per subnet to act as a relay printer server.

Let's say you have two subnets, and You need to have routing already configured to pass traffic between the two subnets, so everyone can ping everyone. Let's say you have your CUPS printer server at, and you want computers on to be able to use it. This is a complete, barebones example CUPS configuration for

LogLevel warning

#this varies; check your distribution
SystemGroup lpadmin

# Allow remote users to access this server
Port 631
Listen /var/run/cups/cups.sock

# Enable printer sharing
Browsing On
BrowseAllow all
DefaultAuthType Basic

# Allow shared printing
Order allow,deny

# Only local users can access Web admin pages
Order allow,deny
Allow localhost

# Only local system users can access config files
AuthType Basic
Require user @SYSTEM
Order allow,deny
Allow localhost

You may use hostnames in place of IP addresses. Then restart CUPS, either /etc/init.d/cupsys restart on Debian-ish systems, or /etc/init.d/cup restart on Fedora/Red Hat-ish systems.

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