The A10 Networks ADC must enforce the limit of three consecutive invalid logon attempts.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-68033	AADC-NM-000015	SV-82523r1_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. The A10 Networks ADC must be configured to limit the consecutive invalid logon attempts. When someone attempts to log on, but fails repeatedly, the failed logon attempts and associated "user is disabled" message will be logged. Note: The user will still be prompted up to five times, even when the account is disabled at three failed logon attempts.

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. The A10 Networks ADC must be configured to limit the consecutive invalid logon attempts. When someone attempts to log on, but fails repeatedly, the failed logon attempts and associated "user is disabled" message will be logged. Note: The user will still be prompted up to five times, even when the account is disabled at three failed logon attempts.

STIG	Date
A10 Networks ADC NDM Security Technical Implementation Guide	2016-04-15

Details

Check Text ( C-68593r1_chk )
Review the configuration. The following command shows the device configuration and filters the output on the keyword "lockout": show run \| inc lockout View the output; it will contain these commands: admin lockout enable admin lockout reset-time 15 admin lockout threshold 3 If it does not, this is a finding.

Fix Text (F-74149r1_fix)
The following command enables admin lockout: admin lockout enable The following example locks the admin account after three failed logon attempts sets the A10 ADC to remember the last failed logon for 15 minutes: admin lockout threshold 3 admin lockout reset-time 15 Note: This will be applied to all administrative accounts.