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.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-266069 | SRG-APP-000065-NDM-000214 | F5BI-DM-300013 | SV-266069r1024600_rule | 2025-06-12 | 1 |
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.
ℹ️ Check
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
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