.\"	$NetBSD: nis.8,v 1.3 2009/10/24 12:21:31 reed Exp $
.\"
.\" Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
.\" All rights reserved.
.\" Portions Copyright (c) 1994 Jason R. Thorpe.  All rights reserved.
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.Dd February 26, 2005
.Dt NIS 8
.Os
.Sh NAME
.Nm nis ,
.Nm yp
.Nd description of the NIS (formerly YP) subsystem
.Sh SYNOPSIS
.Nm ypbind
.Op Fl ypset
.Nm ypbind
.Op Fl ypsetme
.Pp
.Nm ypset
.Op Fl h Ar host
.Op Fl d Ar domain
.Ar server
.Pp
.Nm yppoll
.Op Fl h Ar host
.Op Fl d Ar domain
.Ar mapname
.Pp
.Nm ypcat
.Op Fl kt
.Op Fl d Ar domainname
.Ar mapname
.Nm ypcat
.Fl x
.Pp
.Nm ypmatch
.Op Fl kt
.Op Fl d Ar domainname
.Ar key ... mapname
.Nm ypmatch
.Fl x
.Pp
.Nm ypwhich
.Op Fl d Ar domain
.Oo
.Op Fl t
.Fl m Op Ar mname
|
.Ar host
.Oc
.Nm ypwhich
.Fl x
.Pp
.Nm ypserv
.Op Fl d
.Op Fl x
.Pp
.Nm yppush
.Op Fl d Ar domainname
.Op Fl h Ar hostname
.Op Fl v
.Ar mapname
.Pp
.Nm ypxfr
.Op Fl bcf
.Op Fl d Ar domain
.Op Fl h Ar host
.Op Fl s Ar domain
.Op Fl C Ar tid prog ipadd port
.Ar mapname
.Pp
.Nm ypinit
.Fl m
.Op Ar domainname
.Nm ypinit
.Fl s
.Ar master_server
.Op Ar domainname
.Pp
.Nm yptest
.Pp
.Nm rpc.yppasswdd
.Op Fl noshell
.Op Fl nogecos
.Op Fl nopw
.Op Fl m Ar arg1 arg2 ...
.Sh DESCRIPTION
The
.Tn NIS
subsystem allows network management of passwd and group file
entries through the functions
.Xr getpwent 3
and
.Xr getgrent 3 .
.Tn NIS
also provides hooks for other client programs, such as
.Xr amd 8
and
.Xr rpc.bootparamd 8 ,
that can use
.Tn NIS
maps.
.Pp
Password maps in standard YP are insecure, because the pw_passwd
field is accessible by any user. A common solution to this is to
generate a secure map (using
.Dq makedbm -s )
which can only be accessed by a client bound to a privileged port.
To activate the secure map, see the appropriate comment in
.Pa /var/yp/Makefile.yp .
.Pp
The
.Tn NIS
subsystem is conditionally started in
.Pa /etc/rc .
See the
.Pa /etc/rc.conf
file for configuration variables.
.Sh SEE ALSO
.Xr domainname 1 ,
.Xr ypcat 1 ,
.Xr ypmatch 1 ,
.Xr ypwhich 1 ,
.Xr ypclnt 3 ,
.Xr group 5 ,
.Xr hosts_access 5 ,
.Xr nsswitch.conf 5 ,
.Xr passwd 5 ,
.Xr rc.conf 5 ,
.Xr rc 8 ,
.Xr ypbind 8 ,
.Xr ypinit 8 ,
.Xr yppoll 8 ,
.Xr yppush 8 ,
.Xr ypserv 8 ,
.Xr ypset 8 ,
.Xr yptest 8 ,
.Xr ypxfr 8
.Sh HISTORY
The
.Tn NIS
client subsystem was originally written by Theo de Raadt
to be compatible with Sun's implementation.  The
.Tn NIS
server suite was originally written by Mats O Jansson.
.Sh BUGS
If
.Xr ypbind 8
cannot find a server, the system behaves the same way as Sun's code:
it hangs.
.Pp
The
.Sq secure map
feature is not compatible with non-BSD implementations as found
e.g. in Solaris.