The F5 BIG-IP appliance must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must block any login attempt for at least 15 minutes.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-266069 | F5BI-DM-300013 | SV-266069r1024600_rule | CCI-000044 | 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. | ||||
| STIG | Date | |||
| F5 BIG-IP TMOS NDM Security Technical Implementation Guide | 2025-06-12 | |||
Details
Check Text (C-266069r1024600_chk)
From the BIG-IP GUI:
1. System.
2. Users.
3. Authentication.
4. Verify Maximum Login Failures set to "3".
5. Verify User Lockout set to "Automatically enable locked-out user after 900 seconds".
From the BIG-IP console, type the following command:
tmsh list auth password-policy max-login-failures
Note: Check for a value of "3".
tmsh list auth password-policy lockout-duration
Note: Check for a value of "900".
If the BIG-IP appliance is not configured to enforce the limit of three consecutive invalid logon attempts and lock out users for 900 seconds, this is a finding.
Fix Text (F-69895r1023457_fix)
From the BIG-IP GUI:
1. System.
2. Users.
3. Authentication.
4. Set Maximum Login Failures to "3".
5. Set User Lockout to "Automatically enable locked-out user after 900 seconds".
6. Update.
From the BIG-IP console, type the following commands:
tmsh modify auth password-policy max-login-failures 3
tmsh modify auth password-policy lockout-duration 900
tmsh save sys config