Unclassified Information in Non-federal Information Systems and Organizations (NIST 800-171)
Rules and Groups employed by this XCCDF Profile
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SSH client uses strong entropy to seed (Bash-like shells)
To set up SSH client to use entropy from a high-quality source, make sure that the appropriate shell environment variable is configured. The <code>...Rule Medium Severity -
Configure OpenSSH Server if Necessary
If the system needs to act as an SSH server, then certain changes should be made to the OpenSSH daemon configuration file <code>/etc/ssh/sshd_confi...Group -
Set SSH Client Alive Count Max to zero
The SSH server sends at most <code>ClientAliveCountMax</code> messages during a SSH session and waits for a response from the SSH client. The optio...Rule Medium Severity -
Set SSH Client Alive Interval
SSH allows administrators to set a network responsiveness timeout interval. After this interval has passed, the unresponsive client will be automat...Rule Medium Severity -
Disable Host-Based Authentication
SSH's cryptographic host-based authentication is more secure than <code>.rhosts</code> authentication. However, it is not recommended that hosts un...Rule Medium Severity -
Disable SSH Access via Empty Passwords
Disallow SSH login with empty passwords. The default SSH configuration disables logins with empty passwords. The appropriate configuration is used ...Rule High Severity -
Disable GSSAPI Authentication
Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like GSSAPI. <br> The default SSH configuration disallows ...Rule Medium Severity -
Disable Kerberos Authentication
Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like Kerberos. <br> The default SSH configuration disallow...Rule Medium Severity -
Disable SSH Root Login
The root user should never be allowed to login to a system directly over a network. To disable root login via SSH, add or correct the following lin...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 -
Force frequent session key renegotiation
The <code>RekeyLimit</code> parameter specifies how often the session key of the is renegotiated, both in terms of amount of data that may be trans...Rule Medium Severity -
SSH server uses strong entropy to seed
To set up SSH server to use entropy from a high-quality source, edit the <code>/etc/sysconfig/sshd</code> file. The <code>SSH_USE_STRONG_RNG</code>...Rule Low Severity -
USBGuard daemon
The USBGuard daemon enforces the USB device authorization policy for all USB devices.Group -
Install usbguard Package
Theusbguard
package can be installed with the following command:$ sudo yum install usbguard
Rule Medium Severity -
Enable the USBGuard Service
The USBGuard service should be enabled. The <code>usbguard</code> service can be enabled with the following command: <pre>$ sudo systemctl enable ...Rule Medium Severity -
Log USBGuard daemon audit events using Linux Audit
To configure USBGuard daemon to log via Linux Audit (as opposed directly to a file), <code>AuditBackend</code> option in <code>/etc/usbguard/usbgua...Rule Low Severity -
Authorize Human Interface Devices and USB hubs in USBGuard daemon
To allow authorization of USB devices combining human interface device and hub capabilities by USBGuard daemon, add the line <code>allow with-inter...Rule Medium Severity -
Uninstall python3-abrt-addon Package
Thepython3-abrt-addon
package can be removed with the following command:$ sudo yum erase python3-abrt-addon
Rule Low Severity
Node 2
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