Listing 4. The /etc/pam.d/sshd specifies security rules for SSH
connections. The pam_access.so module was
added to the standard configuration to provide further
checks.

auth    required        pam_unix2.so
auth    required        pam_nologin.so
account required        pam_unix2.so
account required        pam_access.so
session required        pam_limits.so
session required        pam_unix2.so
session optional        pam_umask.so
password        requisite       pam_pwcheck.so cracklib
password        required        pam_unix2.so use_authtok