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Old 03-10-2003, 06:45 PM   #1
Registered: Aug 2002
Distribution: SME Server, CentOS
Posts: 219

Rep: Reputation: 30
NIS problems: clients not able to use NIS served information

NIS is the Network Information Service that uses the ypserver and ypbind services. What it does is make it possible for the machine hosting the ypserver to provide user passwords and host information over a LAN. You should be able to log into any machine on the LAN using the password distributed by the machine on the network running ypserv.

But I can't seem to get it going. The commands ypwhich show the correct server and ypcat map show that the clients are getting the right user and host information. But, I can't get any of the other programs on the clients to use the information. I can't log in to the client machines or "su" -- switch user -- and I cannot ping another host using the host name which should be resolved using NIS.

What could I possibly be missing? I have exploited the How To's and three different Administrator's Manuals with no complete success. I've tried a completely commented out /etc/ypserv.conf file. I've tried shutting down iptables.

An odd thing is that I was having problems with NFS giving permission to enter NFS mounted directories and now for some reason, they are wide open. Any root can access them.

Any and all tips and clues would be appreciated.
Old 03-11-2003, 02:47 PM   #2
LQ Newbie
Registered: Jan 2003
Distribution: Slackware
Posts: 26

Rep: Reputation: 15
Have you made the necessary changes to /etc/passwd, /etc/group, and /etc/nsswitch.conf?

At the end of /etc/passwd add a line at the end that looks like this:


At the end of /etc/group add a line that looks like this:


In /etc/nsswitch.conf (it may be different on RH) make sure the lines for passwd, shadow, group, and hosts has "nis" in them.

Hope that helps.
Old 03-11-2003, 10:40 PM   #3
Registered: Aug 2002
Distribution: SME Server, CentOS
Posts: 219

Original Poster
Rep: Reputation: 30
Yes, simply editing the nsswitch seemed to get things going.

The administration books I was looking at were only two years old. But I did see some reference to the file in some O'Reilly books and they were about the same age. I made the changes they recommended, which is to change "nisplus" to "nis".

Next stop? DNS.

Thanks all to those who responded!


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