Unable to access root over SSH after PermitRootLogin is set to no
I followed the instructions on this page ([http: // wiki.centos.org/HowTos/Network/SecuringSSH]) in order to secure my sshd and prevent anyone form accessing the server directly as root. Therefore I changed the "PermitRootLogin yes" to "PermitRootLogin no" and restarted sshd. After that root access was denied directly but for some reason I am unable to switch to root from any of the normal user accounts with "su -" because I keep getting the "Incorrect password" errors. I am sure that the password is correct but for some, to me unclear, reasons I am unable to access the root account over SSH from a normal user account. I also noticed that after that I lost the ability to access the server as root over SFTP.
Can anyone shed some light on why I am unable to generally use the root account after doing the named changes to sshd_config/ I am running CentOS 5.4 with the newest update. Thank you.