Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

The Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide (V1 R2) has 391 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R2

CurrentPublished Wed Sep 30 2026

TOSS 5 must ensure account lockouts persist.

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Assessment Title

Rule Text

TOSS 5 must ensure account lockouts persist.

Description

Discussion Text

Lockouts persisting across reboots ensure that the account is only unlocked by an administrator. If the lockouts did not persist across reboots, an attacker could simply reboot the system to continue brute-force attacks against the accounts on the system.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-282362

Rule

SV-282362r1200066_rule

Severity

medium

Rule Version

TOSS-05-000308

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the "/etc/security/faillock.conf" file is configured use a nondefault faillock directory to ensure contents persist after reboot using the following command:

$ grep 'dir =' /etc/security/faillock.conf

dir = /var/log/faillock

If the "dir" option is not set to a nondefault documented tally log directory, is missing or commented out, this is a finding.

Implementation Procedure

Fix Text

Configure TOSS 5 to maintain the contents of the faillock directory after a reboot.

Add or modify the "/etc/security/faillock.conf" file to match the following line:

dir = /var/log/faillock

STIG check 11 of 391 in the Tri-Lab Operating System Stack (TOSS) 5 STIG checklist

← Previous · V-282361TOSS 5 must automatically lock an account when three unsuccessful login attempts occur during a 15-minute time period.Next · V-282363 →TOSS 5 must log username information when unsuccessful login attempts occur.