Sun, Jun 20, 2004 at 14:52:35, zagarin wrote about "sshd & pam & getpwnam()": 

> Does anybody know, why sshd call getpwnam() even if user is 
> authenticating via PAM? This broke remote authentication (RADIUS, 
> TACACS+) when user doesn't exist in local password database.

Because you mix two different things - users directory (in modern unixes
including 5.* it is implemented as NSS) and authentication (implemented as PAM).
To log in with sshd, user must be known in passwd database; if sshd would
enable user to log in without account, this won't be sshd, but will be
anything another.

To allow remote user lists, use NIS; for now it is the only working
and well-tested mechanism to spread user list (passwd.*) for many systems.
See "YP/NIS INTERACTION" in passwd(5) for details.


-netch-
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