Details

The /etc/hosts.allow file supports access control by IP and helps ensure that only authorized systems can connect to the system.

Solution

Run the following command to create /etc/hosts.allow: # echo ‘ALL: /, /, …’ >/etc/hosts.allow where each / combination (for example, ‘192.168.1.0/255.255.255.0’) represents one network block in use by your organization that requires access to this system.

Supportive Information

The following resource is also helpful.

• https://www.cisco.com/c/en/us/td/docs/security/firepower/623/configuration/guide/fpmc-config-guide-v623.html

This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Unix.

References

• 800-53|SC-7(5)
• CSCv6|9.2

Source

• Tenable.com/audits