AlmaLinux OS 9 must have the firewalld package installed.

"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols.

Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best.

Remote access is access to DoW nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless.

AlmaLinux OS 9 functionality (e.g., SSH) must be capable of taking enforcement action if the audit reveals unauthorized activity. Automated control of remote access sessions allows organizations to ensure ongoing compliance with remote access policies by enforcing connection rules of remote access applications on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000298-GPOS-00116, SRG-OS-000297-GPOS-00115

Verify that the firewalld package is installed with the following command:

$ dnf list --installed firewalld

Installed Packages firewalld.noarch 1.2.1-1.el9 @anaconda

If the "firewalld" package is not installed, this is a finding.

Install the "firewalld" package using the following command:

$ dnf install firewalld