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The Application Firewall is the built in firewall that comes with Mac OS X and must be enabled. Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network.

An attacker might attempt to log in as an authorized user, through stolen credentials, unpatched exploits, or brute force attempts to guess a valid username and password. If a user is attempting to log in to a system at an unusual time, or if there are many failed attempts, there is a possibility that the system is the target of an attack. Auditing logon events mitigates this risk by recording all ...

The permissions of csh init files must be 644 or as appropriate. Use the command chmod 644 /etc/csh.cshrc /etc/csh.login /etc/csh.logout to set permissions of csh init files or as appropriate.

Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determine how long it takes to crack a password. The more complex the password, the greater the number of ...

The group of csh init files must be wheel. Use the command chown :0 /etc/csh.cshrc /etc/csh.login /etc/csh.logout to change the group owner as appropriate.

Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. One method of minimizing this risk is to use complex passwords and periodically change them. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised.

By auditing access restriction enforcement, changes to application and OS configuration files can be audited. Without auditing the enforcement of access restrictions, it will be difficult to identify attempted attacks and an audit trail will not be available for forensic investigation. Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. ...

If events associated with non-local administrative access or diagnostic sessions are not logged, a major tool for assessing and investigating attacks would not be available. This requirement addresses auditing-related issues associated with maintenance tools used specifically for diagnostic and repair actions on organizational information systems. Non-local maintenance and diagnostic activities ar ...

Controls whether a user can use the OSX GUI to start or switch to a login session running as another user concurrently. In .GlobalPreferences.plist, set the MultipleSessionEnabled key to false to disable fast user switching.

The setting controls whether local user accounts are visible in the login window. In loginwindow.plist, set the SHOWFULLNAME key = true to hide local user accounts. If the key does not exist, user accounts are displayed.


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