I have a nis login say, user1. The NIS server runs on solaris 7. Also i got a workstation which runs on solaris 7.
Now see the fun.
I logged in *my workstation* as super user (root).
When i executed
# su - user1 i could log in as user1 without any password.
Similarly I was able to log in to any user account in the NIS database from my local root account without a password !!!!
Weird ???