RHEL 6.X allows any user log in, it does not enforce host based access.

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Issue

We are using OpenLdap for authentication in our environment.
We use the host attribute to specifically allow users access to systems. The server will allow anyone to login, even when the host is not part of the users ldap profile.
The people that are able to login to a rhel6 without the host in their profile, all have ldap uid's that are under 500. could this have anything to do with it?

Environment

Red Hat Enterprise Linux 6

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