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.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-266069r1024600_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
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".