Hi! Please help!
Currently I am setting up a Lan using Linux 9 with one NIS Master , one NIS slaves and a number of NIS clients.

Recently, I have encountered one problem at client - unable to change the NIS password.
The following error messages were collected :

[wanch@c103]$ passwd
Changing password for user wanch.
Changing password for wanch
(current) UNIX password:
New password:
Retype new password:
Error while changing NIS password.

The password has not been changed on s2.
passwd: Failed preliminary check by password service

[wanch@c103]$ yppasswd
Changing NIS account information for wanch on s2.
Please enter old password:
Changing NIS password for wanch on s2.
Please enter new password:
Please retype new password:
Error while changing the NIS password.
The NIS password has not been changed on s2.

S2 is my NIS master. The service yppasswd is running fine at server end and I can change password at server. I have tried to restart the yp* services at both server and client ends but still unable to find out the fault.

Thanks.

is yppasswd running on both the NIS Master & Slave?

Thanks for the reply.

Yes, I have yppasswdd at both NIS master and slave

These are services found in my NIS master s2 and NIS slave s1
using command 'rpcinfo ..."
[root@s1 root]# rpcinfo -p s2
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 32768 status
100024 1 tcp 32768 status
100021 1 udp 32769 nlockmgr
100021 3 udp 32769 nlockmgr
100021 4 udp 32769 nlockmgr
391002 2 tcp 32769 sgi_fam
100011 1 udp 680 rquotad
100011 2 udp 680 rquotad
100011 1 tcp 683 rquotad
100011 2 tcp 683 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100005 1 udp 32771 mountd
100005 1 tcp 32770 mountd
100005 2 udp 32771 mountd
100005 2 tcp 32770 mountd
100005 3 udp 32771 mountd
100005 3 tcp 32770 mountd
100004 2 udp 834 ypserv
100004 1 udp 834 ypserv
100004 2 tcp 834 ypserv
100004 1 tcp 834 ypserv
100009 1 udp 707 yppasswdd
600100069 1 udp 835 fypxfrd
600100069 1 tcp 835 fypxfrd
100007 2 udp 803 ypbind
100007 1 udp 803 ypbind
100007 2 tcp 806 ypbind
100007 1 tcp 806 ypbind
[root@s1 root]# rpcinfo -p s1
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 32768 status
100024 1 tcp 32768 status
100021 1 udp 32769 nlockmgr
100021 3 udp 32769 nlockmgr
100021 4 udp 32769 nlockmgr
100004 2 udp 834 ypserv
100004 1 udp 834 ypserv
100004 2 tcp 834 ypserv
100004 1 tcp 834 ypserv
600100069 1 udp 835 fypxfrd
600100069 1 tcp 835 fypxfrd
100007 2 udp 607 ypbind
100007 1 udp 607 ypbind
100007 2 tcp 610 ypbind
100007 1 tcp 610 ypbind
391002 2 tcp 32769 sgi_fam
100011 1 udp 680 rquotad
100011 2 udp 680 rquotad
100011 1 tcp 683 rquotad
100011 2 tcp 683 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100005 1 udp 32770 mountd
100005 1 tcp 32770 mountd
100005 2 udp 32770 mountd
100005 2 tcp 32770 mountd
100005 3 udp 32770 mountd
100005 3 tcp 32770 mountd
100009 1 udp 719 yppasswdd

I am able to login at client end as non-root user but unable to change my nis password.
The client seems to fail to send the PW to s2.

I'm having a similar problem. I setup NIS on Redhat 5.1 and for all other user's it seems okay but when I try to change my own password on a NIS client it says the following...

NIS CLIENT....
[jglenton@server ~]$ passwd
Changing password for user jglenton.
Changing password for jglenton
(current) UNIX password:
New UNIX password:
Retype new UNIX password:
NIS password could not be changed.
passwd: Failed preliminary check by password service
[jglenton@server ~]$

This is the result on the NIS Master.

NIS MASTER....
[root@server2 ~]# yppasswd jglenton
Changing NIS account information for jglenton on server2.random.com.
Please enter root password:
Changing NIS password for jglenton on server2.random.com.
Please enter new password:
Please retype new password:
Error while changing the NIS password.
The NIS password has not been changed on server.random.com.
[root@server2 ~]#

Any help would be very appreciated...!

Thanks
James