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Australian Cyber Security Centre (ACSC) ISM Official

Rules and Groups employed by this XCCDF Profile

  • Disable SSH Support for User Known Hosts

    SSH can allow system users to connect to systems if a cache of the remote systems public keys is available. This should be disabled. <br><br> To e...
    Rule Medium Severity
  • Disable X11 Forwarding

    The X11Forwarding parameter provides the ability to tunnel X11 traffic through the connection to enable remote graphic connections. SSH has the cap...
    Rule Medium Severity
  • Do Not Allow SSH Environment Options

    Ensure that users are not able to override environment variables of the SSH daemon. <br> The default SSH configuration disables environment process...
    Rule Medium Severity
  • Enable Use of Strict Mode Checking

    SSHs <code>StrictModes</code> option checks file and ownership permissions in the user's home directory <code>.ssh</code> folder before accepting l...
    Rule Medium Severity
  • Enable SSH Warning Banner

    To enable the warning banner and ensure it is consistent across the system, add or correct the following line in <code>/etc/ssh/sshd_config</code...
    Rule Medium Severity
  • Enable SSH Print Last Log

    Ensure that SSH will display the date and time of the last successful account logon. <br> The default SSH configuration enables print of the date a...
    Rule Medium Severity
  • Set LogLevel to INFO

    The INFO parameter specifices that record login and logout activity will be logged. <br> The default SSH configuration sets the log level to INFO. ...
    Rule Low Severity
  • Set SSH authentication attempt limit

    The <code>MaxAuthTries</code> parameter specifies the maximum number of authentication attempts permitted per connection. Once the number of failur...
    Rule Medium Severity
  • USBGuard daemon

    The USBGuard daemon enforces the USB device authorization policy for all USB devices.
    Group
  • Install usbguard Package

    The usbguard package can be installed with the following command:
    $ sudo yum install usbguard
    Rule Medium Severity

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