Try using the yppasswd command (or passwd -y) to keep nis working.

On 10/13/05, Martti Kuparinen <martti.kuparinen@iki.fi> wrote:
> Martti Kuparinen wrote:
>
> > # ssh user@xxx
> > # passwd
> > Old Password:
> > New Password:
> > Retype New Password:
> > Couldn't change NIS password.
> > Unable to change auth token: error in service module
>
> Okay, this was my old problem [1] again. I executed pwd_mkdb to
> rebuild pwd.db and spwd.db and now everything is working just fine.
>
> Shouldn't /var/yp/Makefile.yp rebuild these databases when
> the source file (master.passwd) has been changed?
>
> [1] http://mail-index.netbsd.org/netbsd-help/2002/06/11/0006.html
>