NIS

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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

Next put your NIS domain name into the file /etc/conf.d/nisdomainname.

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

ypserver your.nis.server

Start the rpcbind and ypbind daemons (add them to your rc.conf file if you want it to start automatically).

# /etc/rc.d/rpcbind start
# /etc/rc.d/ypbind start

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

# /etc/rc.d/ypbind restart

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/conf.d/nisdomainname

Add the domain name to /etc/conf.d/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

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:

# cd /var/yp
# make

/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 the domain name of 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

systemd

Simply use the systemctl command to enable and start the ypbind service:

# systemctl enable ypbind.service

More resources