This article contains instruction on sharing printers between systems, be it between two GNU/Linux systems or between a GNU/Linux system and Microsoft Windows.
- 1 Between GNU/Linux systems
- 2 Between GNU/Linux and Windows
- 2.1 Linux server - Windows client
- 2.2 Windows server - Linux client
- 3 Remote administration
- 4 Troubleshooting
- 5 Other operating systems
Between GNU/Linux systems
The server can be configured using either the web interface or by manually editing
To configure the client, see CUPS#Network 2.
Using the web interface
Open up the web interface to the server, select the Administration tab, look under the Server heading, and enable the "Share printers connected to this system" option. Save your change by clicking on the Change Settings button. The server will automatically restart.
For more complex configurations, you can directly edit the
/etc/cups/cupsd.conf file by selecting Edit Configuration File. See #Manual setup for more information.
On the server computer (the one directly connected to the printer), allow access to the server by modifying the location directive. For instance:
<Location /> Order allow,deny Allow localhost Allow 192.168.0.* </Location> ...
Also make sure the server is listening on the IP address the client will use:
... Listen <hostname>:631 ...
There are more configuration possibilities, including automatic methods, which are described in detail in Using Network Printers.
After making any modifications, restart the
If CUPS is started using socket activation, create a drop-in snippet for
org.cups.cupsd.socket so that socket activation also works for remote connections:
To enable browsing (shared printer discovery), Avahi must be installed and running on the server. If you do not need printer discovery, Avahi is not required on either the server or the client.
To enable browsing, either select Share printers connected to this system in the web interface, or manually turn on Browsing and set the BrowseAddress:
... Browsing On BrowseAddress 192.168.0.*:631 ...
and restart the
Note that "browsing" at the print server is a different thing from "browsing" at a remote networked host. On the print server,
cupsd provides the DNS-SD protocol support which the
avahi-daemon broadcasts. The
cups-browsed service is unnecessary on the print server, unless also broadcasting the old CUPS protocol, or the print server is also "browsing" for other networked printers. On the remote networked host, the
cups-browsed service is required to "browse" for network broadcasts of print services, and running
cups-browsed will also automatically start
org.cups.cupsd.service service will be automatically started when a USB printer is plugged in, however this may not be the case for other connection types. If
cupsd is not running,
avahi-daemon does not broadcast the print services, so in that case the systemd unit service file must be modified to start on boot, and then the service must again be "enabled/installed" with the new dependency. To do this, edit the service file
[Install] section to add a
WantedBy=default.target dependency, and then enable and start the
Between GNU/Linux and Windows
Linux server - Windows client
Sharing via IPP
The preferred way to connect a Windows client to a Linux print server is using IPP, as the configuration is simpler than using Samba. It is a standard printer protocol based on HTTP, allowing you to use port forwarding, tunneling etc. IPP has been natively supported by Windows since Windows 2000.
First, configure the server as described in the section #Between GNU/Linux systems.
On the Windows computer, go to Control Panel > Devices and Printers and choose 'Add a printer'. If on Windows 10, click "The printer that I want isn't listed". Next, choose 'Select a shared printer by name' and type in the location of the printer:
(where hostname is the GNU/Linux server's hostname or IP address and printer_name is the name of the print queue being connected to. You can also use the server's fully qualified domain name, if it has one, but you may need to set
ServerAlias my_fully_qualified_domain_name in
/etc/cups/cupsd.conf for this to work).
After this, install the native printer drivers for your printer on the Windows computer. If the CUPS server's print queue is set up to use its own printer drivers instead of as a
raw queue, you can just select a generic postscript printer driver for the Windows client (e.g. 'HP Color LaserJet 8500 PS' or 'Xerox DocuTech 135 PS2').
Sharing via Samba
If your client's Windows version is below Windows 2000 or if you experienced troubles with IPP you can also use Samba for sharing. Note of course that with Samba this involves another complex piece of software. This makes this way more difficult to configure and thus sometimes also more error-prone, mostly due to authentication problems.
To configure Samba on the Linux server, edit
/etc/samba/smb.conf file to allow access to printers. File
smb.conf can look something like this:
[global] workgroup=Heroes server string=Arch Linux Print Server security=user [printers] comment=All Printers path=/var/spool/samba browseable=yes # to allow user 'guest account' to print. guest ok=no writable=no printable=yes create mode=0700 write list=@adm root yourusername
That should be enough to share the printer, yet adding an individual printer entry may be desirable:
[ML1250] comment=Samsung ML-1250 Laser Printer printer=ml1250 path=/var/spool/samba printing=cups printable=yes printer admin=@admin root yourusername user client driver=yes # to allow user 'guest account' to print. guest ok=no writable=no write list=@adm root yourusername valid users=@adm root yourusername
Please note that this assumes configuration was made so that users must have a valid account to access the printer. To have a public printer, set guest ok to yes, and remove the valid users line. To add accounts, set up a regular GNU/Linux account and then set up a Samba password on the server. For instance:
# useradd yourusername # smbpasswd -a yourusername
After this, restart the Samba daemon.
Obviously, there are a lot of tweaks and customizations that can be done with setting up a Samba print server, so it is advised to look at the Samba and CUPS documentation for more help. The
smb.conf.example file also has some good samples that might warrant imitating.
Windows server - Linux client
Sharing via LPD
Windows 7, 8 and 10 have a built-in LPD server - using it will probably be the easiest approach as it does neither require an installation of Samba on the client nor heavy configuration on the server. It can be activated in the Control Panel under Programs -> Activate Windows functions in the section Print services. The printer must have shared activated in its properties. Use a share name without any special characters like spaces, commas, etc.
Then the printer can be added in CUPS, choosing LPD protocol. The printer address will look like this:
Before adding the printer, you will most likely have to install an appropriate printer driver depending on your printer model. Generic PostScript or RAW drivers might also work.
Sharing via IPP
As above, IPP is also the preferred protocol for printer sharing although it only works with Windows Server versions. Windows Server versions (e.g. Server 2016) include IPP support ("Print and Document Services" role, "Internet Printing" service). Client versions (e.g. Windows 10), only include the IPP client, and do no support sharing through IPP.
Sharing via Samba
A much simpler way is using Window's native printer sharing via Samba. There is almost no configuration needed, and all of it can be done from the CUPS Backend. As above noted, if there are any problems the reason is mostly related to authentication trouble and Windows access restrictions.
On the server side enable sharing for your desired printer and ensure that the user on the client machine has the right to access the printer.
The following section describes how to set up the client, assuming that both daemons (cupsd and smbd) are running.
Configuration using the web interface
The Samba CUPS back-end is enabled by default, if for any reason it is not activate it by entering the following command and restarting CUPS.
# ln -s $(which smbspool) /usr/lib/cups/backend/smb
Next, simply log in on the CUPS web interface and choose to add a new printer. As a device choose "Windows Printer via SAMBA".
For the device location, enter:
Or without a password:
Make sure that the user actually has access to the printer on the Windows computer and select the appropriate drivers. If the computer is located on a domain, make sure the URI includes the domain:
For manual configuration stop the CUPS daemon and add your printer to
/etc/cups/printers.conf, which might for example look like this
<DefaultPrinter MyPrinter> AuthInfoRequired username,password Info My printer via SAMBA Location In my Office MakeModel Samsung ML-1250 - CUPS+Gutenprint v5.2.7 # <= use 'lpinfo -m' to list available models DeviceURI smb://username:password@hostname/printer_name # <= server URI as described in previous section State Idle Type 4 Accepting Yes Shared No JobSheets none none QuotaPeriod 0 PageLimit 0 KLimit 0 AllowUser yourusername # <= do not forget to change this OpPolicy default ErrorPolicy stop-printer </Printer>
Then restart the CUPS daemon and try to print a test page.
Finding URIs for Windows print servers
Sometimes Windows is a little less than forthcoming about exact device URIs (device locations). If having trouble specifying the correct device location in CUPS, run the following command to list all shares available to a certain windows username:
$ smbtree -U windowsusername
This will list every share available to a certain Windows username on the local area network subnet, as long as Samba is set up and running properly. It should return something like this:
WORKGROUP \\REGULATOR-PC \\REGULATOR-PC\Z \\REGULATOR-PC\Public \\REGULATOR-PC\print$ Printer Drivers \\REGULATOR-PC\G \\REGULATOR-PC\EPSON Stylus CX8400 Series EPSON Stylus CX8400 Series
What is needed here is first part of the last line, the resource matching the printer description. So to print to the EPSON Stylus printer, one would enter:
smb://username.password@REGULATOR-PC/EPSON Stylus CX8400 Series
as the URI into CUPS.
Once the server is set up as described in #Between GNU/Linux systems, it can also be configured so that it can be remotely administered. Add the allowed hosts to the
<Location /admin> block in
/etc/cups/cupsd.conf, using the same syntax as described in #Manual setup. Note that three levels of access can be granted:
<Location /> #access to the server <Location /admin> #access to the admin pages <Location /admin/conf> #access to configuration files
To give remote hosts access to one of these levels, add an
Allow statement to that level's section. An
Allow statement can take one or more of the forms listed below:
Allow from all Allow from host.domain.com Allow from *.domain.com Allow from ip-address Allow from ip-address/netmask Allow from @LOCAL
Deny statements can also be used. For example, to give full access to all hosts on your local network interfaces, edit
/etc/cups/cupsd.conf to include this:
# Restrict access to the server... # By default only localhost connections are possible <Location /> Order allow,deny Allow from @LOCAL </Location> # Restrict access to the admin pages... <Location /admin> Order allow,deny Allow from @LOCAL </Location> # Restrict access to configuration files... <Location /admin/conf> AuthType Basic Require user @SYSTEM Order allow,deny Allow from @LOCAL </Location>
You might also need to add:
This should avoid the error: 426 - Upgrade Required when using the CUPS web interface from a remote machine.
Kerberos can be used to authenticate users accessing a remote CUPS server. This assumes that your machine has a keytab and it will need a ticket for "HTTP". Instead of using
http://localhost:631 you must use
https://host.example.co.uk:631 - encryption is required for auth (hence https) and the full hostname is needed so that Kerberos/Negotiate can work. In addition, the server must be configured in
/etc/cups/cupsd.conf to use a
If you are using Samba's winbind NSS support, you can add an AD group name to
/etc/cups/cups-files.conf - in the following example
sysadmin might be an AD group:
SystemGroup sys root sysadmin
See CUPS/Troubleshooting for general troubleshooting tips.
Cannot print with GTK applications
If you get a getting printer information failed message when you try to print from GTK applications, add this line to your
# serverip some.name.org ServersHostname
Permission errors on Windows
Some users fixed 'NT_STATUS_ACCESS_DENIED' (Windows clients) errors by using a slightly different syntax:
Other operating systems
More information on interfacing CUPS with other printing systems can be found in the CUPS manual, e.g. on http://localhost:631/help/network.html