All AlmaLinux OS 9 networked systems must implement SSH to protect the confidentiality and integrity of transmitted and received information, including information being prepared for transmission.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-269437	SRG-OS-000424-GPOS-00188	ALMA-09-042810	SV-269437r1050320_rule	2025-02-20	1

Description
Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirement applies to both internal and external networks and all types of information system components from which information can be transmitted (e.g., servers, mobile devices, notebook computers, printers, copiers, scanners, and facsimile machines). Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. Protecting the confidentiality and integrity of organizational information can be accomplished by physical means (e.g., employing physical distribution systems) or by logical means (e.g., employing cryptographic techniques). If physical means of protection are employed, then logical means (cryptography) do not have to be employed, and vice versa. Satisfies: SRG-OS-000424-GPOS-00188, SRG-OS-000426-GPOS-00190

Description

Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirement applies to both internal and external networks and all types of information system components from which information can be transmitted (e.g., servers, mobile devices, notebook computers, printers, copiers, scanners, and facsimile machines). Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. Protecting the confidentiality and integrity of organizational information can be accomplished by physical means (e.g., employing physical distribution systems) or by logical means (e.g., employing cryptographic techniques). If physical means of protection are employed, then logical means (cryptography) do not have to be employed, and vice versa. Satisfies: SRG-OS-000424-GPOS-00188, SRG-OS-000426-GPOS-00190

ℹ️ Check
Verify that "sshd" is active with the following command: $ systemctl status sshd sshd.service - OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; preset: enabled) Active: active (running) since Fri 2024-01-26 09:41:09 UTC; 2h 48min ago If the "sshd" service is not enabled and active, this is a finding.

✔️ Fix
To enable the sshd service run the following command: $ systemctl enable --now sshd