Printer Sharing

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m (resolved ssh question at top of document.)
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/jffs/etc/init.d/p910nd /jffs/etc/init.d/p910nd
 +For v24_TNG (sp2) versions, the command should be:
 + /jffs/etc/init.d/p910nd start
and check that it came up. You should be able to print now (see bottom of this page for instructions on how to set up your workstation for IP printing via ddwrt). and check that it came up. You should be able to print now (see bottom of this page for instructions on how to set up your workstation for IP printing via ddwrt).
Line 88: Line 92:
Hope that helps. Hope that helps.
--[[User:Mbjarland|Mbjarland]] 07:33, 27 June 2008 (CEST) --[[User:Mbjarland|Mbjarland]] 07:33, 27 June 2008 (CEST)
==Print server== ==Print server==

Revision as of 01:10, 13 October 2008

DD-WRT allows for clientless printer sharing making it easy to install printers directly into the router without the need for a seperate computer. You must have installed USB support (usb_storage, sd_mod etc. can be left out if no need for external storage).

The following must be done via telnet or SSH:


Printer driver

Install printer driver:

 ipkg -force-depends install kmod-usb-printer

Edit /jffs/etc/config/usb.startup and add

 insmod /jffs/lib/modules/2.4.30/printer.o

Connect printers and reboot your router

See if any printers have been found:

 dmesg | grep usb

It should show something like this (I have 2 printers connected)

 <6>printer.c: usblp0: USB Bidirectional printer dev 5 if 0 alt 0 proto 2 vid 0x04F9 pid 0x000D
 <6>printer.c: usblp1: USB Bidirectional printer dev 6 if 0 alt 0 proto 2 vid 0x04A9 pid 0x108C

usblp0 means that the found printer is accessible at /dev/usb/lp0 etc.

Note: The 'USB Support' link above refers to installing several modules. On my WRT350N, I had to install these additional modules (usb-uhci.o and usb-ohci.o) to get my router to detect that my printer was plugged in.

comments from wmd1942:

I found the command "insmod /jffs/lib/modules/2.4.30/printer.o" is unnecessary if you have Core USB Support, USB 2.0 Support and USB Printer Support enabled in the 'Services' section of the router web page.

Notes For v24 Stable

The new v24 stable (i.e. not the release candidate versions) contains support for printer sharing and usb support in the web UI. I just got my printer server working and I figured I'd share my experience and maybe save somebody and hour or two.

Here's what I had to do to get my LaserJet 3020 to work with DDWRT on an Asus WL-500g Premium with the "DD-WRT v24 (05/24/08) mega - build 9526" version of the firmware:

1. Enable "JFFS2 Support" on the Administration tab.

2. Enable SSH on the Services tab

3. Enable "Core USB Support", "USB 1.1 Support (UHCI)", "USB 1.1 Support (OHCI)", "USB 2.0 Support", "USB Printer Support" on the Services tab (all items under "USB Support" except for "USB Storage Support"). Note that the router did not recognize my printer if I left the USB 1.1 drivers unselected. This even though the printer supports USB 2.0.

4. Connect your printer to the router

5. Reboot your router

6. Log in with SSH to your router. And check if your printer was recognized:

 root@my-ddwrt-router:/jffs/etc/default# ls -la /dev/usb/
 drwxr-xr-x    1 root     root            0 Jan  1  1970 .
 drwxr-xr-x    1 root     root            0 Jan  1  1970 ..
 crw-rw----    1 root     root     180,   0 Jan  1  1970 lp0

if there is nothing in /dev/usb/ you need to change something, probably involving installing some other driver for your printer.

7. Look at the following files:

  /jffs/etc/default/p910nd contains the configuration used for the printer server when it's started 
  /jffs/etc/init.d/p910nd contains the startup script used to start the printer server

At least on my version of v24, the third line in the startup script had the following line:


this was invalid on my router (people more familiar with the router, please correct me here or explain the intricacies involved) and I had to edit this file and change the line to say:


there are two commands that you can run to check if the server is running:

  root@my-ddwrt-router:/jffs/etc/init.d# netstat -an
  Active Internet connections (servers and established)
  Proto Recv-Q Send-Q Local Address           Foreign Address         State
  tcp        0      0  *               LISTEN
  tcp        0      0    *               LISTEN
  root@ddwrt-se-office:/jffs/etc/init.d# ps | grep p9100d
  561 root        680 S   p9100d -b -f /dev/usb/lp0 0

If you see a 91xx port listening in netstat and you see the p9100d running in ps, your server is probably up and running properly. Check that the server is not running yet. If not, test starting the the server by issuing:


For v24_TNG (sp2) versions, the command should be:

  /jffs/etc/init.d/p910nd start

and check that it came up. You should be able to print now (see bottom of this page for instructions on how to set up your workstation for IP printing via ddwrt).

8. Add the above command to the Administration->Commands edit box and click "Save Startup". This makes sure that the printer server comes up the next time you reboot your router.

Hope that helps. --Mbjarland 07:33, 27 June 2008 (CEST)

Print server

Now Install printserver daemon:

 ipkg install p910nd

Edit /jffs/etc/config/usb.startup and add

 #brother laser
 /jffs/usr/sbin/p910nd -b -f /dev/usb/lp0 0
 #canon inkjet
 /jffs/usr/sbin/p910nd -b -f /dev/usb/lp1 1

(correct the above to match your setup)

-b means bidirectional, -f specifices device name, and the last number can be 0,1 or 2, making the print server listen at port 9100, 9101 and 9102 respectively.

Reboot your router

Now, you router works as a print server over TCP/IP

Note: You may have to remove the '-b' option for p910nd. I couldn't print with that option included.

comments from wmd1942:

In order to load the printer server in startup, the execution permission has to be added to this "usb.startup" file:

root@DD-WRT:chmod +x /jffs/etc/config/usb.startup

After reboot, use command:

ps | grep p910

The screen should be something like:

root@DD-WRT:~# ps | grep p910 306 root 356 S /jffs/usr/sbin/p9100d -f /dev/usb/lp0 0 n

Workstation setup

Ubuntu Linux

  • Go to System, Administration, Printing.
  • Click New Printer
  • Choose AppSocket/HP JetDirect
  • Hostname: IP address of the wireless printer (normally
  • Port: 9100 for first printer, 9101 for second printer, etc
  • Click Forward and go on with the printer wizard to select brand, model and settings as you would do for a local printer

Windows XP

  • Find your printer in Control Panel - Printers etc. and open the properties page for it.
  • Select the Ports tab.
  • Click Add Port and choose Standard TCP/IP printer port and click New Port
  • Enter you router's IP address (normally and click Next
  • Set Device type to custom and click settings.
  • Make sure RAW is selected and specify the necessary port number (normally 9100) and click OK
  • Click Next and Finish and Close
  • Make sure the newly created port is selected for your printer and click OK

Mac OS X 10.5 (Leopard)

  • Open System Preferences
  • Open Print & Fax
  • Click the + button below the list of installed printers
  • Select the toolbar button called 'IP'
  • Set protocol to: HP Jetdirect - Socket
  • Enter the address of your router followed by : and the port - ie. normally
  • Leave 'Queue' blank
  • Set a friendly name for your printer (whatever you like)
  • And a friendly location (again, up to you)
  • Print Using: choose 'Select a driver to use'
  • A list will pop up of all installed printer drivers - choose the one that works for you (see Note below)
  • Add your printer

Note (Mac only): the driver must be compatible with the CUPS printing system, which is one of the two printing systems included in OS X. Certain printers e.g. Canon Pixma series and Epson Inkjet include OSX drivers which do not use CUPS. You may find compatible printer drivers from Gutenprint (free) or PrintFab ($). OS X Leopard appears to include certain Gutenprint drivers, but the quality may vary and it may be worth checking their website for updated versions, or try PrintFab.

Printing from WAN

If you want to be able to print from the WAN side of your router do the following:

In the web interface go to Administration - Commands and hit the "Command shell" field and type in

 /usr/sbin/iptables -I INPUT 1 -p tcp --dport 9100:9102 -j logaccept

And click Save Firewall

Your router reboots and you can now print from WAN side

NOTE: This is not recommended if your WAN is directly accessible from internet, but useful at private subnets of companies, colleges etc.