| SRG-NET-000019-FW-000003 |
The firewall must be configured to use filters that use packet headers and packet attributes, including source and destination IP addresses and ports, to prevent the flow of unauthorized or suspicious traffic between interconnected networks with different security policies (including perimeter firewalls and server VLANs). |
| SRG-NET-000019-FW-000004 |
The firewall must immediately use updates made to policy enforcement mechanisms such as firewall rules, security policies, and security zones. |
| SRG-NET-000061-FW-000001 |
The firewall that filters traffic from the VPN access points must be configured with organization-defined filtering rules that apply to the monitoring of remote access traffic. |
| SRG-NET-000074-FW-000009 |
The firewall must generate traffic log entries containing information to establish what type of events occurred. |
| SRG-NET-000075-FW-000010 |
The firewall must generate traffic log entries containing information to establish when (date and time) the events occurred. |
| SRG-NET-000076-FW-000011 |
The firewall must generate traffic log entries containing information to establish the location on the network where the events occurred. |
| SRG-NET-000077-FW-000012 |
The firewall must generate traffic log entries containing information to establish the source of the events, such as the source IP address at a minimum. |
| SRG-NET-000078-FW-000013 |
The 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. |
| SRG-NET-000089-FW-000019 |
In the event that communication with the central audit server is lost, the firewall must continue to queue traffic log records locally. |
| SRG-NET-000098-FW-000021 |
The firewall must be configured to use TCP when sending log records to the central audit server. |
| SRG-NET-000099-FW-000161 |
The firewall must protect the traffic log from unauthorized modification of local log records. |
| SRG-NET-000100-FW-000023 |
The firewall must protect the traffic log from unauthorized deletion of local log files and log records. |
| SRG-NET-000131-FW-000025 |
The firewall must disable or remove unnecessary network services and functions that are not used as part of its role in the architecture. |
| SRG-NET-000192-FW-000029 |
The firewall must block outbound traffic containing denial-of-service (DoS) attacks to protect against the use of internal information systems to launch any DoS attacks against other networks or endpoints. |
| SRG-NET-000193-FW-000030 |
The firewall implementation must manage excess bandwidth to limit the effects of packet flooding types of denial-of-service (DoS) attacks. |
| SRG-NET-000202-FW-000039 |
The firewall must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception). |
| SRG-NET-000205-FW-000040 |
The perimeter 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. |
| SRG-NET-000235-FW-000133 |
The firewall must fail to a secure state upon the failure of the following: system initialization, shutdown, or system abort. |
| SRG-NET-000236-FW-000027 |
In the event of a system failure of the firewall function, the firewall must be configured to save diagnostic information, log system messages, and load the most current security policies, rules, and signatures when restarted. |
| SRG-NET-000333-FW-000014 |
The firewall must be configured to send traffic log entries to a central audit server for management and configuration of the traffic log entries. |
| SRG-NET-000335-FW-000017 |
If communication with the central audit server is lost, the firewall must generate a real-time alert to, at a minimum, the SCA and ISSO. |
| SRG-NET-000362-FW-000028 |
The 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. |
| SRG-NET-000364-FW-000031 |
The firewall must apply ingress filters to traffic that is inbound to the network through any active external interface. |
| SRG-NET-000364-FW-000032 |
The firewall must apply egress filters to traffic that is outbound from the network through any internal interface. |
| SRG-NET-000364-FW-000035 |
The premise firewall (located behind the premise router) must block all outbound management traffic. |
| SRG-NET-000364-FW-000036 |
The firewall must restrict traffic entering the VPN tunnels to the management network to only the authorized management packets based on destination address. |
| SRG-NET-000392-FW-000042 |
The firewall must generate an alert that can be forwarded to, at a minimum, the ISSO and ISSM when denial-of-service (DoS) incidents are detected. |
| SRG-NET-000492-FW-000006 |
The firewall must generate traffic log records when traffic is denied, restricted, or discarded. |
| SRG-NET-000493-FW-000007 |
The firewall must generate traffic log records when attempts are made to send packets between security zones that are not authorized to communicate. |
| SRG-NET-000364-FW-000040 |
The firewall must be configured to inspect all inbound and outbound traffic at the application layer. |
| SRG-NET-000364-FW-000041 |
The firewall must be configured to inspect all inbound and outbound IPv6 traffic for unknown or out-of-order extension headers. |
| SRG-NET-000364-FW-000042 |
The firewall must be configured to restrict it from accepting outbound packets that contain an illegitimate address in the source address field via an egress filter or by enabling Unicast Reverse Path Forwarding (uRPF). |
| SRG-NET-000705-FW-000110 |
The firewall must be configured to employ organization-defined controls by type of denial-of-service (DoS) to achieve the DoS objective. |
| SRG-NET-000715-FW-000120 |
The firewall must be configured to implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions. |
| SRG-NET-000760-FW-000160 |
The firewall must be configured to establish organization-defined alternate communications paths for system operations organizational command and control. |