CUPS and Samba as Printserver in a Samba/LDAP-Domain with Debian Lenny
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This short howto is an update from my old howto and describes a Samba-(3.0.30-2) and CUPSYS-(1.3.7-5) configuration for a print server as member of a Samba-Domain with (Open)LDAP backend. This example is based on a debian lenny system (current in testing).
First setting up the ldap-connections to get all users and groups. I use an OpenLDAP server (2.3.30-5+etch1) as backend for the samba PDC/BDC (3.0.24-6etch10). Install the necessary packages apt-get install libnss-ldap cupsys with there dependencies and edit the configs:
Your /etc/nsswitch.conf should contain the following lines (winbind comes later):
passwd: compat ldap winbind group: compat ldap winbind shadow: compat ldap hosts: files winbind mdns4_minimal [NOTFOUND=return] dns mdns4
You also have to set up the /etc/ldap/ldap.conf like this:
BASE dc=your,dc=ldap,dc=suffix URI ldap://<your first ldap server ip>:389 ldap://<your second ldap server ip>:389 pam_password exop LDAP_VERSION 3 nss_base_passwd ou=people,dc=your,dc=ldap,dc=suffix?one nss_base_shadow ou=people,dc=your,dc=ldap,dc=suffix?one nss_base_group ou=groups,dc=your,dc=ldap,dc=suffix?one
With this configurations and the right settings in your /etc/libnss-ldap.conf:
base dc=your,dc=ldap,dc=suffix
uri ldap://<your first ldap server ip>/ ldap://<your second ldap server ip>/
ldap_version 3
# The ldap-admin account. The appropriate password is in /etc/libnss-ldap.secret. Keep the permissions right.
rootbinddn cn=admin,dc=your,dc=ldap,dc=suffix
nss_base_passwd ou=people,dc=your,dc=ldap,dc=suffix?one
nss_base_shadow ou=people,dc=your,dc=ldap,dc=suffix?one
nss_base_group ou=groups,dc=your,dc=ldap,dc=suffix?one
you should get all your local and ldap users with getent passwd and all groups with getent group. During your tests you should stop the nscd-daemon if it runs. With a getent passwd (and a running configured winbind) you get tree types of user entries:
... sshd:x:103:65534::/var/run/sshd:/usr/sbin/nologin ... user:x:10001:513:full name:/homedir:/bin/false ... domain\user:*:15001:15001:full name:/homedir:/bin/false ...
The first entry is from your /etc/passwd, the second is over LDAP and the last is over winbind.
Now install and setting up the samba server (apt-get install samba). This moment, version 3.0.30-2 is in lenny. Here is my configuration:
# global parameters
[global]
## NETBIOS / Domain Server settings
workgroup = <your domain>
netbios name = <the netbios name>
security = domain
server string = <a string>
## USER / LDAP settings
ldap suffix = dc=your,dc=ldap,dc=suffix
ldap machine suffix = ou=machines
ldap group suffix = ou=groups
ldap user suffix = ou=people
ldap idmap suffix = ou=idmap
ldap admin dn=cn=admin,dc=your,dc=ldap,dc=suffix
idmap backend = ldap:"ldap://<your first ldap server ip> ldap://<your second ldap server ip>"
winbind enum users = yes
winbind enum groups = yes
## WINS / DNS settings
wins server = <your WINS server ip('s)>
dns proxy = no
name resolve order = wins hosts bcast
## LOGGING
syslog = 0
log level = 3 passdb:1 auth:1 winbind:1
panic action = /usr/share/samba/panic-action %d
max log size = 1000
log file = /var/log/samba/log.%m
## MISC Files/Directories
map acl inherit = yes
case sensitive = no
directory mask = 0770
hide unreadable = yes
printcap name = cups
printing = cups
cups options = "raw"
### userful in an multidomain environment
printjob username = %D\%U
### prevent driver name changing
force printername = yes
### printer admin is marked as deprecated
### use: net rpc rights grant "<Domain\username>" SePrintOperatorPrivilege -U <admin>
### 'enable privileges = yes' must be set (it's the default)
[printers]
comment = all printers
path = /var/spool/samba
public = yes
guest ok = yes
writable = no
printable = yes
[print$]
comment = printer drivers
path = /var/lib/samba/printers
browseable = yes
guest ok = no
read only = yes
write list = "<Domain\name>"
Join the domain with net rpc join -U <admin> -S <domain>.
And don't forget a smbpasswd -w to set the LDAP-Password. For this you should use a dash-shell to prevent passwords in your shell history.
Now check the nessesary directories for spooling the jobs /var/spool/samba and the printer drivers /var/lib/samba/printers and the right permissons. The printer admins need write access to the driver directory. Add a printer admin or better a group with the command net rpc rights grant "<Domain\name>" SePrintOperatorPrivilege -U <admin> and the associated password. Groups from trusted domains are also available here. You need to set this rights only on your print server. There is no replication mechanism (yet) over your domain. You don't see this rights inside the MS-Printer options dialog, but you can set printer options (it's not greyed-out). The driver installation should be done with one account, because driver values could be changed and you get a 'permission denied' (/var/lib/samba/ntprinters.tdb) or better set force printername = yes.
Now comment out the line beginning with application/octet-stream inside the files /etc/cups/mime.types and /etc/cups/mime.convs.
Use the admistration webfronted coming with cupsys to add some RAW-printers. Now you are ready to use the Add Printer Wizard or the cupsaddsmb to upload the necessary printer driver.
You can set the default print options for the client drivers on a MS Windows admin PC. Please use the right dialog. :-) You can get more useful details on this and this chapter. You can't set "Enable advanced printing features", because this use EMF and it's not supported by samba/cups. Do You have a problem with drivers an missing paper sizes? This article could be helpful.
Todo: samba and cups fine tuning (refresh rate inside the printer view, ...)
Copyright and License
This document, CUPS and Samba as Printserver in a Samba/LDAP-Domain, is copyrighted (c) by Tom Geißer,.
last changes: 25.08.2008
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is available at http://www.gnu.org/copyleft/fdl.html.
