NIS install for OpenBSD 4.0
Updated 3/7/07

A. Changes to Master Server
	Presuming that master server is Linux.

	% touch /etc/master.passwd
	% chmod 600 /etc/master.passwd

	/etc/ypserv.conf needs to have the following line added on all NIS
	  servers:
	*:*:master.password.byname:port
	Then, you may need to "killall -HUP ypserv"

	The /var/yp/Makefile needs to be tweaked up on the master.
	Find the section that starts with "passwd.byname:" that is used when
	  the makefile is told to merge passwd and shadow. Copy the whole 
	  section down to where the shadow map is made. change the 
	  "passwd.byname:" at the beginning to "master.passwd.byname:".

	Your cronjob that makes the passwd, shadow and group maps needs to also
	  make master.passwd.btname. If you have yppush lines in your 
	  cronjob, also push the master.passwd.byname to each slave.

	On each slave, run "/usr/lib/yp/ypinit -s (master)" to create the
	  master.passwd.byname association.

B. Slave Server
	I'm not sure if port-based security can be set on a BSD yp server.
	It is a requirement to safely secure the master.passwd and shadow maps.

C. Client
	Create file /etc/defaultdomain and enter your NIS domain into this file
	  and save it.
	Make the directory /etc/yp .
	Create file /etc/yp/DOMAINNAME. On each line, enter just the 
	  name of each NIS server.
	Run the command:
	  chmod 600 /etc/yp/DOMAINNAME
	Make the directory /var/yp/binding . 
	Create file /var/yp/binding/DOMAINNAME.version
	Edit /etc/rc.conf .
	  portmap=YES
	Run "vipw". Enter the following line:
	  +:*::::::::
	edit /etc/group . Enter the following lines:
	+vector:*::
	+staff:*::
	Run the command "pwd_mkdb -p /etc/master.passwd"

	Run the command "ln -s /bin/sh /bin/zsh"
	Reboot, or run:
	  portmap
	  domainname < /etc/defaultdomain
	  ypbind
	To test,
	  ypcat passwd
	In order to actually authenticate to the machine, a reboot is required.