← Back to F5 BIG-IP TMOS NDM Security Technical Implementation Guide

V-266064

CAT II (Medium)

The F5 BIG-IP appliance must be configured to limit the number of concurrent sessions to the Configuration Utility to 10 or an organization-defined number.

Rule ID

SV-266064r1024595_rule

STIG

F5 BIG-IP TMOS NDM Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-000054 CCI-002385

Discussion

Device management includes the ability to control the number of administrators and management sessions that manage a device. Limiting the number of allowed administrators and sessions per administrator is helpful in limiting risks related to denial-of-service (DoS) attacks. This requirement addresses concurrent sessions for administrative accounts and does not address concurrent sessions by a single administrator via multiple administrative accounts. Satisfies: SRG-APP-000001-NDM-000200, SRG-APP-000435-NDM-000315

Check Content

From the BIG-IP GUI:
1. System.
2. Preferences.
3. Verify that System Settings view is set to Advanced.
4. Verify Maximum HTTP connections to Configuration Utility is set to 10 or an organization-defined number.

From the BIG-IP console, type the following command:

tmsh list sys httpd max-clients

If the device is not configured to limit the number of concurrent sessions to the Configuration Utility to 10 or an organization-defined number, this is a finding.

Fix Text

From the BIG-IP GUI:
1. System.
2. Preferences.
3. Set System Settings view to Advanced.
4. Maximum HTTP connections to Configuration Utility: enter 10 or an organization-defined number.
5. Update.

From the BIG-IP console, type the following commands:

tmsh modify sys httpd max-clients <10 or an organization-defined number>
tmsh save sys config