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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-234219	FGFW-ND-000300	SV-234219r917462_rule		Medium

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.

STIG	Date
Fortinet FortiGate Firewall NDM Security Technical Implementation Guide	2023-06-01

Details

Check Text ( C-37404r917460_chk )
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 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.

Check Text ( C-37404r917460_chk )

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

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 Text (F-37369r917461_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 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 Text (F-37369r917461_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
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.