The BIG-IP appliance must be configured to automatically lock the account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-229002	F5BI-DM-000185	SV-229002r557520_rule		Medium

Description
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.

STIG	Date
F5 BIG-IP Device Management 11.x Security Technical Implementation Guide	2020-09-28

Details

Check Text ( C-31317r518051_chk )
Verify the BIG-IP appliance is configured to use a properly configured remote authentication server to automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded. Navigate to the BIG-IP System manager >> System >> Users >> Authentication. Verify that "User Directory" is set to an approved authentication server type that automatically locks the account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded. If an account is not automatically locked out until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded, this is a finding.

Check Text ( C-31317r518051_chk )

Verify the BIG-IP appliance is configured to use a properly configured remote authentication server to automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded.

Navigate to the BIG-IP System manager >> System >> Users >> Authentication.

Verify that "User Directory" is set to an approved authentication server type that automatically locks the account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded.

If an account is not automatically locked out until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded, this is a finding.

Fix Text (F-31294r518052_fix)
Configure the BIG-IP appliance to use a properly configured remote authentication server to automatically lock the account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes are exceeded.