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Firewall Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000335

    <GroupDescription></GroupDescription>
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  • 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.

    &lt;VulnDiscussion&gt;Without a real-time alert (less than a second), security personnel may be unaware of an impending failure of the audit functi...
    Rule Medium Severity
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  • SRG-NET-000362

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  • 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.

    &lt;VulnDiscussion&gt;Not configuring a key boundary security protection device such as the firewall against commonly known attacks is an immediate...
    Rule High Severity
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  • SRG-NET-000364

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  • The firewall must apply egress filters to traffic that is outbound from the network through any internal interface.

    &lt;VulnDiscussion&gt;If outbound communications traffic is not filtered, hostile activity intended to harm other networks or packets from networks...
    Rule Medium Severity
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  • SRG-NET-000364

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  • The premise firewall (located behind the premise router) must block all outbound management traffic.

    &lt;VulnDiscussion&gt;The management network must still have its own subnet in order to enforce control and access boundaries provided by Layer 3 n...
    Rule Medium Severity
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  • SRG-NET-000364

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  • The firewall must restrict traffic entering the VPN tunnels to the management network to only the authorized management packets based on destination address.

    &lt;VulnDiscussion&gt;Protect the management network with a filtering firewall configured to block unauthorized traffic. This requirement is simila...
    Rule Medium Severity
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  • SRG-NET-000392

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  • 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.

    &lt;VulnDiscussion&gt;Without an alert, security personnel may be unaware of major detection incidents that require immediate action, and this dela...
    Rule Low Severity
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  • SRG-NET-000399

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  • The firewall must be configured to allow authorized users to record a packet capture based IP, traffic type (TCP, UDP, or ICMP), or protocol.

    &lt;VulnDiscussion&gt;Without the ability to capture, record, and log content related to a user session, investigations into suspicious user activi...
    Rule Medium Severity
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  • SRG-NET-000492

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  • The firewall must generate traffic log records when traffic is denied, restricted, or discarded.

    &lt;VulnDiscussion&gt;Without generating log records that log usage of objects by subjects and other objects, it would be difficult to establish, c...
    Rule Medium Severity
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  • SRG-NET-000493

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  • The firewall must generate traffic log records when attempts are made to send packets between security zones that are not authorized to communicate.

    &lt;VulnDiscussion&gt;Without generating log records that are specific to the security and mission needs of the organization, it would be difficult...
    Rule Medium Severity
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  • SRG-NET-000364

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  • The firewall must be configured to inspect all inbound and outbound traffic at the application layer.

    &lt;VulnDiscussion&gt;Application inspection enables the firewall to control traffic based on different parameters that exist within the packets su...
    Rule Medium Severity
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