OpenBSD YP Client Setup

Author: Pantelis Roditis
Created: 2006/08/14 03:49

Introduction

Configuring an OpenBSD to act as YP client and join a YP Domain.

Preparing the system

Edit /etc/rc.conf.local and add the following lines in order to enable the rpc/nis damons during system startup.

portmap=YES
amd=YES
rpc.lockd=YES

Add the NIS domain on /etc/defaultdomain

echo mynisdomain > /etc/defaultdomain

Configure amd to auto mount home directories.

 echo "/home amd.home" >> /etc/amd/master

Note that the automounted home is mounted on top of the existing /home.

Append NIS maps to passwd and group files

Add the following entry +:*:::::::: into your password databases using vipw

pwd_mkdb /etc/master.passwd
echo "+:*::" >> /etc/group

Start the daemons

portmap
ypbind
amd -x error,noinfo,nostats -a /tmp_mnt -l syslog /home amd.home
rpc.lockd

These will be started automaticaly after reboot.

Testing and Maintenance

The above configuration should allow users with accounts created on the master server to login on the client machines without creating new accounts and to have a familiar shell environment. Passwords can be changed from client machines using yppasswd.

Things to check if it’s not working:

    rpcinfo -p host      # to see rpc registered progs on host
    mount -v             # to check nfs mounts
    ypcat amd.home       # to check yp amd.home map
    ypmatch user passwd  # to check user entry in passwd map
    id                   # to check user belongs to correct groups
    less /var/log/daemon # error messages
    amq                  # various options for controlling amd

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