The following describes a procedure to set up NIS network name service under Red Hat Linux. This is geared toward a small intallation with only one domain. However, it should be fairly evident how to add more NIS domains. The NIS domain name has nothing to do with any DNS naming convention being used.
In these examples, the following conventions are used:
NIS domain: “internal”
Code or configuration file data: bold
Root prompt on NIS master server: master#
Root prompt on NIS client host: client#
Setting up a NIS master server:
yum install yp-tools ypbind ypserv portmap ntpd
Set up “ntpd” service or otherwise make sure the host’s clock is synchronized.
ntpdate pool.ntp.org
chkconfig ntpd on
/etc/init.d/ntpd start
Edit /etc/yp.conf:
domain internal server ip.of.nis.server
Edit /etc/ypserv.conf:
[The below settings are, by default, activated in CentOS config]
dns: no
files: 30
xfr_check_port: yes
* : * : shadow.byname : port
* : * : passwd.adjunct.byname : port
Edit /etc/sysconfig/network:
NISDOMAIN=”internal”
Set NIS domain name:
master# domainname internal
master# ypdomainname internal
Create file /var/yp/securenets:
host 127.0.0.1
255.255.255.0 10.0.0.0
Make sure the “portmap” service is running:
master# service portmap start
master# chkconfig portmap on
Edit File: /etc/nsswitch.conf
passwd: files nis
shadow: files nis
group: files nis
Start ypserv service:
master# service ypserv start
Check that it’s listening:
master# rpcinfo -u localhost ypserv
You should see:
program 100004 version 1 ready and waiting
program 100004 version 2 ready and waiting
Initialize the NIS maps:
master# /usr/lib/yp/ypinit -m
Specify local hostname, Ctrl-D, y, let finish.
Start up ypbind, yppasswdd, ypxfrd:
master# service ypbind start
master# service yppasswdd start
master# service ypxfrd start
Set YP services to run on boot-up:
master# chkconfig ypserv on
master# chkconfig ypbind on
master# chkconfig yppasswdd on
master# chkconfig ypxfrd on
NIS client host setup
Required packages: yp-tools ypbind portmap
Edit /etc/sysconfig/network:
NISDOMAIN=internal
Edit /etc/yp.conf:
domain internal server ip.of.master.server
Edit /etc/hosts:
ip.of.master.server hostname.domain hostname
Set NIS domain-name:
client# domainname internal
client# ypdomainname internal
Edit /etc/nsswitch.conf:
passwd: files nis
shadow: files nis
group: files nis
Make sure the portmap service is running:
client# service portmap start
client# chkconfig portmap on
The /etc/hosts.allow file will need rules allowing access from localhost and the NIS master server.
Start ypbind service:
client# service ypbind start
client# chkconfig ypbind on
Test it out:
client# rpcinfo -u localhost ypbind
client# ypcat passwd
