Difference between revisions of "NIS"

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(Cleaned up some old references (before systemd) and added important information about /etc/hosts. Also added a simpler way to configure everything.)
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Now edit the /etc/yp.conf file and add your ypserver or nis server.
 
Now edit the /etc/yp.conf file and add your ypserver or nis server.
 
  ypserver your.nis.server
 
  ypserver your.nis.server
 +
 +
It may be a good idea to add your NIS server to /etc/hosts
 +
192.168.1.10  nis_server.domain.com  nis_server
  
 
Start the rpcbind and ypbind daemons (use systemd enable to make it automatic at boot).
 
Start the rpcbind and ypbind daemons (use systemd enable to make it automatic at boot).
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== Configuration ==
 
== Configuration ==
  
=== /etc/conf.d/nisdomainname ===
+
=== /etc/hosts ===
  
Add the domain name to /etc/conf.d/nisdomainname:
+
Add your server's '''external''' (not 127.0.0.1) IP address to the hosts file. Make sure it is the first non-commented line in the file, yes, even above the localhost line, like so:
 +
#
 +
# /etc/hosts: static lookup table for host names
 +
#
 +
 +
#<ip-address> <hostname.domain.org> <hostname>
 +
#::1 localhost.localdomain localhost
 +
192.168.1.10  nis_server.domain.com  nis_server
 +
127.0.0.1 localhost.localdomain localhost nis_server
 +
# End of file
 +
 
 +
This is due to a peculiarity in ypinit (maybe it's a bug, maybe it's a feature), which will '''always''' add the first line in /etc/hosts to the list of ypservers.
 +
 
 +
=== /etc/nisdomainname ===
 +
 
 +
Add the domain name to /etc/nisdomainname:
  
 
  # NISDOMAINNAME="nis-domain-name"
 
  # NISDOMAINNAME="nis-domain-name"
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  #        # amd.home auto.master auto.home auto.local passwd.adjunct \
 
  #        # amd.home auto.master auto.home auto.local passwd.adjunct \
 
  #        # timezone locale netmasks
 
  #        # timezone locale netmasks
 
Due to recent changes in networking in Archlinux you have to change the line:
 
 
# LOCALDOMAIN = `/bin/domainname`
 
 
to
 
 
# LOCALDOMAIN = `/bin/hostname -d`
 
  
 
After that you have to build your NIS database:
 
After that you have to build your NIS database:
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  # cd /var/yp
 
  # cd /var/yp
 
  # make
 
  # make
 +
 +
Or you can do it in a more automated fashion:
 +
 +
# /usr/lib/yp/ypinit -m
 +
 +
If you use this way you may skip manually adding lines to /var/yp/ypservers.
  
 
=== /var/yp/securenets ===
 
=== /var/yp/securenets ===
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=== /var/yp/ypservers ===
 
=== /var/yp/ypservers ===
  
Add the domain name of your server to /var/yp/ypservers:
+
Add your server to /var/yp/ypservers:
  
 
  # your.nis.server
 
  # your.nis.server
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  # systemctl enable ypbind.service
 
  # systemctl enable ypbind.service
 
  # systemctl enable ypserv.service
 
  # systemctl enable ypserv.service
 
=== systemd ===
 
Simply use the systemctl command to enable and start the ypbind service:
 
# systemctl enable ypbind.service
 
  
 
== More resources ==
 
== More resources ==

Revision as of 21:44, 19 October 2013

Tango-document-new.pngThis article is a stub.Tango-document-new.png

Notes: please use the first argument of the template to provide more detailed indications. (Discuss in Talk:NIS#)

NIS is a protocol developed by Sun to allow one to defer user authentication to a server. The server software is in the ypserv package, and the client software is in the yp-tools package. ypbind-mt is also available, which is a multi threaded version of the client daemon.

Note: Obviously this article is far from finished. hopefully in the future that will change, but in the meantime check the More resources section.

NIS Client

The first step is to install the tools that you need. This provides the configuration files and general tools needed to use NIS.

# pacman -S yp-tools ypbind-mt

Set your domain name:

# ypdomainname EXAMPLE.COM

Now edit the /etc/yp.conf file and add your ypserver or nis server.

ypserver your.nis.server

It may be a good idea to add your NIS server to /etc/hosts

192.168.1.10   nis_server.domain.com   nis_server

Start the rpcbind and ypbind daemons (use systemd enable to make it automatic at boot).

# systemctl start rpcbind
# systemctl start ypbind

To test the setup so far you can run the command yptest:

# yptest

If it works you will, among other things, see the contents of the NIS user database (which is printed in the same format as /etc/passwd).

To actually use NIS to log in you have to edit /etc/nsswitch.conf. Modify the lines for passwd, group and shadow to read:

passwd: files nis
group: files nis
shadow: files nis

And then do not forget

# systemctl restart ypbind

See section 7 of The Linux NIS HOWTO for further information on configuring NIS clients.

NIS Server

Install Packages

Make sure packages ypbind-mt, ypserv, and yp-tools are installed:

# pacman -S ypbind-mt yp-tools ypserv

Configuration

/etc/hosts

Add your server's external (not 127.0.0.1) IP address to the hosts file. Make sure it is the first non-commented line in the file, yes, even above the localhost line, like so:

#
# /etc/hosts: static lookup table for host names
#

#<ip-address>	<hostname.domain.org>	<hostname>
#::1		localhost.localdomain	localhost
192.168.1.10   nis_server.domain.com   nis_server
127.0.0.1	localhost.localdomain	localhost nis_server
# End of file

This is due to a peculiarity in ypinit (maybe it's a bug, maybe it's a feature), which will always add the first line in /etc/hosts to the list of ypservers.

/etc/nisdomainname

Add the domain name to /etc/nisdomainname:

# NISDOMAINNAME="nis-domain-name"

/etc/ypserv.conf

Add rules to /etc/ypserv.conf for your your nis clients of this form:

# ip-address-of-client : nis-domain-name : rule : security

For example:

# 192.168. : home-domain : * : port

For more information see man ypserv.conf.

/var/yp/Makefile

Add or remove files you would like NIS to use to /var/yp/Makefile under the "all" rule.

Default:

# all:  passwd group hosts rpc services netid protocols netgrp \
#         shadow # publickey networks ethers bootparams printcap mail \
#         # amd.home auto.master auto.home auto.local passwd.adjunct \
#         # timezone locale netmasks

After that you have to build your NIS database:

# cd /var/yp
# make

Or you can do it in a more automated fashion:

# /usr/lib/yp/ypinit -m

If you use this way you may skip manually adding lines to /var/yp/ypservers.

/var/yp/securenets

Add rules to /var/yp/securenets to restrict access:

# 255.255.0.0 192.168.0.0 # Gives access to anyone in 192.168.0.0/16

Be sure to comment out this line, as it gives access to anyone.

# 0.0.0.0      0.0.0.0

/var/yp/ypservers

Add your server to /var/yp/ypservers:

# your.nis.server

Start NIS Daemons

initscripts

Note: The daemons MUST be started in this order.

Start rpcbind if it isn't already started:

# systemctl start rpcbind

Start ypbind:

# systemctl start ypbind

Start ypserv:

# systemctl start ypserv

If you want these to start automatically on startup, then

# systemctl enable rpcbind.service
# systemctl enable ypbind.service
# systemctl enable ypserv.service

More resources