IBM AIX 7.x Security Technical Implementation Guide

The IBM AIX 7.x Security Technical Implementation Guide (V3 R4) has 282 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

V3 · R4

CurrentPublished Wed Sep 30 2026

If LDAP authentication is required, AIX must setup LDAP client to refresh user and group caches less than a day.

IBM AIX 7.x Security Technical Implementation Guide

Assessment Title

Rule Text

If LDAP authentication is required, AIX must setup LDAP client to refresh user and group caches less than a day.

Description

Discussion Text

If cached authentication information is out-of-date, the validity of the authentication information may be questionable.

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

Objective

V-215205

Rule

SV-215205r958828_rule

Severity

medium

Rule Version

AIX7-00-001046

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

If LDAP authentication is not required, this is Not Applicable.

Verify the "/etc/security/ldap/ldap.cfg" file to see if the following two keywords have a value that is greater than "900" seconds:

# grep -i usercachetimeout /etc/security/ldap/ldap.cfg
usercachetimeout: 900

# grep -i groupcachetimeout /etc/security/ldap/ldap.cfg
groupcachetimeout: 900

If any of the above keywords does not exist, is commented out, or any value of the above keywords are greater than "900", this is a finding.

Implementation Procedure

Fix Text

Edit the "/etc/security/ldap/ldap.cfg" file to set the following two keywords to have value of "900":
usercachetimeout
groupcachetimeout

Restart LDAP client using command:
# /usr/sbin/restart-secldapclntd

STIG check 36 of 282 in the IBM AIX 7.x STIG checklist

← Previous · V-215204IF LDAP is used, AIX LDAP client must use SSL to authenticate with LDAP server.Next · V-215206 →The AIX /etc/passwd, /etc/security/passwd, and/or /etc/group files must not contain a plus (+) without defining entries for NIS+ netgroups or LDAP netgroups.