Fortinet FortiGate Firewall Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000061-FW-000001
Group -
SRG-NET-000074-FW-000009
Group -
SRG-NET-000075-FW-000010
Group -
The FortiGate firewall must generate traffic log entries containing information to establish when (date and time) the events occurred.
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. To compile an accurate risk assessment and provid...Rule Medium Severity -
SRG-NET-000076-FW-000011
Group -
The FortiGate firewall must generate traffic log entries containing information to establish the network location where the events occurred.
Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. To compile an accurate risk assessment and provi...Rule Medium Severity -
SRG-NET-000077-FW-000012
Group -
The FortiGate firewall must generate traffic log entries containing information to establish the source of the events, such as the source IP address at a minimum.
Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment...Rule Low Severity -
SRG-NET-000078-FW-000013
Group -
The FortiGate firewall must generate traffic log entries containing information to establish the outcome of the events, such as, at a minimum, the success or failure of the application of the firewall rule.
Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the ne...Rule Medium Severity -
SRG-NET-000089-FW-000019
Group -
SRG-NET-000192-FW-000029
Group -
SRG-NET-000098-FW-000021
Group -
The FortiGate firewall must protect traffic log records from unauthorized access while in transit to the central audit server.
Auditing and logging are key components of any security architecture. Logging the actions of specific events provides a means to investigate an attack, recognize resource utilization or capacity th...Rule Medium Severity -
SRG-NET-000099-FW-000161
Group -
The FortiGate firewall must protect the traffic log from unauthorized modification of local log records.
If audit data were to become compromised, forensic analysis and discovery of the true source of potentially malicious system activity would be impossible to achieve. To ensure the veracity of audi...Rule Medium Severity -
SRG-NET-000100-FW-000023
Group -
The FortiGate firewall must protect the traffic log from unauthorized deletion of local log files and log records.
If audit data were to become compromised, forensic analysis and discovery of the true source of potentially malicious system activity would be impossible to achieve. To ensure the veracity of audi...Rule High Severity -
SRG-NET-000131-FW-000025
Group -
SRG-NET-000193-FW-000030
Group -
The FortiGate firewall implementation must manage excess bandwidth to limit the effects of packet flooding types of denial-of-service (DoS) attacks.
A firewall experiencing a DoS attack will not be able to handle production traffic load. The high utilization and CPU caused by a DoS attack will also have an effect on control keep-alives and time...Rule Medium Severity -
SRG-NET-000205-FW-000040
Group -
The FortiGate firewall must filter traffic destined to the internal enclave in accordance with the specific traffic that is approved and registered in the Ports, Protocols, and Services Management (PPSM) Category Assurance List (CAL), Vulnerability Assessments (VAs) for that the enclave.
The enclave's internal network contains the servers where mission-critical data and applications reside. Malicious traffic can enter from an external boundary or originate from a compromised host i...Rule Medium Severity -
SRG-NET-000235-FW-000133
Group -
The FortiGate firewall must fail to a secure state if the firewall filtering functions fail unexpectedly.
Firewalls that fail suddenly and with no incorporated failure state planning may leave the hosting system available but with a reduced security protection. Failure to a known safe state helps preve...Rule Medium Severity -
SRG-NET-000333-FW-000014
Group -
SRG-NET-000335-FW-000017
Group -
If communication with the central audit server is lost, the FortiGate firewall must generate a real-time alert to, at a minimum, the SCA and ISSO.
Without a real-time alert (less than a second), security personnel may be unaware of an impending failure of the audit functions and system operation may be adversely impacted. Alerts provide organ...Rule Medium Severity -
SRG-NET-000362-FW-000028
Group -
The FortiGate firewall must employ filters that prevent or limit the effects of all types of commonly known denial-of-service (DoS) attacks, including flooding, packet sweeps, and unauthorized port scanning.
Not configuring a key boundary security protection device such as the firewall against commonly known attacks is an immediate threat to the protected enclave because they are easily implemented by ...Rule High Severity -
SRG-NET-000364-FW-000031
Group -
The FortiGate firewall must apply ingress filters to traffic that is inbound to the network through any active external interface.
Unrestricted traffic to the trusted networks may contain malicious traffic that poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network...Rule Medium Severity -
SRG-NET-000364-FW-000032
Group -
SRG-NET-000364-FW-000035
Group -
When employed as a premise firewall, FortiGate must block all outbound management traffic.
The management network must still have its own subnet in order to enforce control and access boundaries provided by layer 3 network nodes such as routers and firewalls. Management traffic between t...Rule Medium Severity -
SRG-NET-000364-FW-000036
Group -
The FortiGate firewall must restrict traffic entering the VPN tunnels to the management network to only the authorized management packets based on destination address.
Protect the management network with a filtering firewall configured to block unauthorized traffic. This requirement is similar to the out-of-band management (OOBM) model, in which the production ne...Rule Medium Severity -
SRG-NET-000364-FW-000040
Group -
The FortiGate firewall must be configured to inspect all inbound and outbound traffic at the application layer.
Application inspection enables the firewall to control traffic based on different parameters that exist within the packets such as enforcing application-specific message and field length. Inspectio...Rule Medium Severity -
SRG-NET-000364-FW-000042
Group -
SRG-NET-000392-FW-000042
Group -
The FortiGate firewall must generate an alert that can be forwarded to, at a minimum, the Information System Security Officer (ISSO) and Information System Security Manager (ISSM) when denial-of-service (DoS) incidents are detected.
Without an alert, security personnel may be unaware of major detection incidents that require immediate action, and this delay may result in the loss or compromise of information. The firewall gen...Rule Low Severity -
SRG-NET-000399-FW-000008
Group -
The FortiGate firewall must allow authorized users to record a packet-capture-based IP, traffic type (TCP, UDP, or ICMP), or protocol.
Without the ability to capture, record, and log content related to a user session, investigations into suspicious user activity would be hampered. This configuration ensures the ability to select ...Rule Medium Severity -
SRG-NET-000492-FW-000006
Group -
The FortiGate firewall must generate traffic log records when traffic is denied, restricted, or discarded.
Without generating log records that log usage of objects by subjects and other objects, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify...Rule Medium Severity -
SRG-NET-000493-FW-000007
Group -
The FortiGate firewall must generate traffic log records when attempts are made to send packets between security zones that are not authorized to communicate.
Without generating log records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or i...Rule Medium Severity -
SRG-NET-000019-FW-000003
Group -
The FortiGate firewall must use filters that use packet headers and packet attributes, including source and destination IP addresses and ports.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. Blocking or restricting detected harmful or suspicious communications...Rule High Severity
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