su is OK, but telnet or ssh is not

[Bouda16]

Hello guys,
simple problem - I can use su to switch to user, lets say igor, but using telnet or ssh I'm not able to login. It's just kind of "Authentication failure".

Any suggestion?

[Ivan Krastev]

Check for password expiration. See in syslog/messages files for more information.

regards,
ivan

[Ivan Ferreira]

Can you post the output of finger , maybe the shell is set to false.

[Shoghi Martinez G.]

Maybe users are disabled, check for this.

[kelvinlnx]

Check some of these files:
Log files:
/var/log/messages, /var/log/audit/*, /var/log/secure.
Configuration files:
/etc/hosts.{allow,deny}
/etc/securetty
/etc/nologin (does it exist?)
/etc/passwd

Have you configured PAM or selinux recently?