The FortiGate device must limit the number of logon and user sessions.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-234219	SRG-APP-000001-NDM-000200	FGFW-ND-000300	SV-234219r917462_rule	2023-06-01	1

Description
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 based on account type, role, or access type is helpful in limiting risks related to DoS attacks. This requirement addresses concurrent sessions for administrative accounts and does not address concurrent sessions by a single administrator via multiple administrative accounts. The maximum number of concurrent sessions should be defined based upon mission needs and the operational environment for each system. At a minimum, limits must be set for SSH, HTTPS, account of last resort, and root account sessions.

Description

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 based on account type, role, or access type is helpful in limiting risks related to DoS attacks. This requirement addresses concurrent sessions for administrative accounts and does not address concurrent sessions by a single administrator via multiple administrative accounts. The maximum number of concurrent sessions should be defined based upon mission needs and the operational environment for each system. At a minimum, limits must be set for SSH, HTTPS, account of last resort, and root account sessions.

ℹ️ Check
Log in to the FortiGate GUI with Super-Admin privilege and open a CLI console available from the GUI. or Connect via SSH. Run the following command: show full-configuration sys global \| grep -i admin Check the output of the following lines: set admin-concurrent disable set admin-login-max <number as defined by the organization> If set admin-concurrent is not set to disable, this is a finding. If set admin-login-max is not set to a number defined by the organization, this is a finding. The default setting is 100.

ℹ️ Check

Log in to the FortiGate GUI with Super-Admin privilege and open a CLI console available from the GUI. or Connect via SSH. Run the following command: show full-configuration sys global | grep -i admin Check the output of the following lines: set admin-concurrent disable set admin-login-max <number as defined by the organization> If set admin-concurrent is not set to disable, this is a finding. If set admin-login-max is not set to a number defined by the organization, this is a finding. The default setting is 100.

✔️ Fix
Log in to the FortiGate GUI with Super-Admin privilege and open a CLI console available from the GUI. or Connect via SSH. Execute the following commands: config system global set admin-concurrent disable set admin-login-max <number defined by the organization> end With the implementation of this requirement, the organization can limit each administrator to one active session and limit the total number of concurrent administrator sessions to a value deemed appropriate.

✔️ Fix

Log in to the FortiGate GUI with Super-Admin privilege and open a CLI console available from the GUI. or Connect via SSH. Execute the following commands: config system global set admin-concurrent disable set admin-login-max <number defined by the organization> end With the implementation of this requirement, the organization can limit each administrator to one active session and limit the total number of concurrent administrator sessions to a value deemed appropriate.