Details

Network element management includes the ability to control the number of users and user sessions that utilize a network element. Limiting the number of current sessions per user is helpful in limiting risks related to DoS attacks.

This requirement addresses concurrent sessions for information system accounts and does not address concurrent sessions by single users via multiple system accounts.

The organization-defined number of concurrent sessions must be the same as the requirements specified for the application for which it serves as intermediary.

This policy only applies to application gateways/firewalls (e.g., identity management or authentication gateways) that provide user account services as part of the intermediary services.

Solution

If user access control intermediary services are provided, configure the BIG-IP Core as follows:

Configure the appropriate Virtual Server(s) in the BIG-IP LTM module to limit concurrent sessions to the organization-defined number for virtual servers.

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_F5_BIG-IP_11-x_Y20M10_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: Access Control.This control applies to the following type of system F5.

References

• 800-53|AC-10
• CAT|I
• CCI|CCI-000054
• Rule-ID|SV-215744r557356_rule
• STIG-ID|F5BI-LT-000029
• STIG-Legacy|SV-74699
• STIG-Legacy|V-60269
• Vuln-ID|V-215744

Source

• Tenable.com/audits