From Oracle Linux 5 Security Technical Implementation Guide
Part of GEN000452
Associated with: CCI-000052
Providing users with feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.
Check that pam_lastlog is used and not silent, or that the SSH daemon is configured to display last login information. # grep pam_lastlog /etc/pam.d/sshd If pam_lastlog is present, and does not have the "silent" option, this is not a finding. # grep -i PrintLastLog /etc/ssh/sshd_config If PrintLastLog is not present in the configuration, this is not a finding. This is the default setting. If PrintLastLog is present in the configuration and set to "yes" (case insensitive), this is not a finding. Otherwise, this is a finding.
Implement pam_lastlog, or enable PrintLastLog in the SSH daemon. To enable pam_lastlog, add a line such as "session required pam_lastlog.so" to /etc/pam.d/sshd. To enable PrintLastLog in the SSH daemon, remove any lines disabling this option from /etc/ssh/sshd_config.
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