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Router Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The router must be configured to produce audit records containing information to establish the source of the events.

    <VulnDiscussion>Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up...
    Rule Medium Severity
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  • SRG-NET-000078

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to log all packets that have been dropped.

    &lt;VulnDiscussion&gt;Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is ...
    Rule Low Severity
    Show

  • SRG-NET-000131

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to have all non-essential capabilities disabled.

    &lt;VulnDiscussion&gt;A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via ...
    Rule Low Severity
    Show

  • SRG-NET-000168

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to use encryption for routing protocol authentication.

    &lt;VulnDiscussion&gt;A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000168

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to authenticate all routing protocol messages using NIST-validated FIPS 198-1 message authentication code algorithm.

    &lt;VulnDiscussion&gt;A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000192

    <GroupDescription></GroupDescription>
    Group
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  • The PE router must be configured to limit the number of MAC addresses it can learn for each Virtual Private LAN Services (VPLS) bridge domain.

    &lt;VulnDiscussion&gt;VPLS defines an architecture that delivers Ethernet multipoint services over an MPLS network. Customer Layer 2 frames are for...
    Rule Medium Severity
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  • SRG-NET-000193

    <GroupDescription></GroupDescription>
    Group
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  • The MPLS router with RSVP-TE enabled must be configured with message pacing or refresh reduction to adjust maximum number of RSVP messages to an output queue based on the link speed and input queue size of adjacent core routers.

    &lt;VulnDiscussion&gt;RSVP-TE can be used to perform constraint-based routing when building LSP tunnels within the network core that will support Q...
    Rule Low Severity
    Show

  • SRG-NET-000193

    <GroupDescription></GroupDescription>
    Group
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  • The PE router providing Virtual Private LAN Services (VPLS) must be configured to have traffic storm control thresholds on CE-facing interfaces.

    &lt;VulnDiscussion&gt;A traffic storm occurs when packets flood a VPLS bridge, creating excessive traffic and degrading network performance. Traffi...
    Rule Medium Severity
    Show

  • SRG-NET-000193

    <GroupDescription></GroupDescription>
    Group
    Show

  • The PE router must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks.

    &lt;VulnDiscussion&gt;DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS...
    Rule Medium Severity
    Show

  • SRG-NET-000193

    <GroupDescription></GroupDescription>
    Group
    Show

  • The PE router must be configured to enforce a Quality-of-Service (QoS) policy in accordance with the QoS DoDIN Technical Profile.

    &lt;VulnDiscussion&gt;Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...
    Rule Low Severity
    Show

  • SRG-NET-000193

    <GroupDescription></GroupDescription>
    Group
    Show

  • The P router must be configured to enforce a Quality-of-Service (QoS) policy in accordance with the QoS GIG Technical Profile.

    &lt;VulnDiscussion&gt;Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...
    Rule Low Severity
    Show

  • SRG-NET-000202

    <GroupDescription></GroupDescription>
    Group
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  • The perimeter router must be configured to deny network traffic by default and allow network traffic by exception.

    &lt;VulnDiscussion&gt;A deny-all, permit-by-exception network communications traffic policy ensures that only connections that are essential and ap...
    Rule High Severity
    Show

  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
    Show

  • The router must be configured to restrict traffic destined to itself.

    &lt;VulnDiscussion&gt;The route processor handles traffic destined to the router—the key component used to build forwarding paths and is also instr...
    Rule High Severity
    Show

  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to drop all fragmented Internet Control Message Protocol (ICMP) packets destined to itself.

    &lt;VulnDiscussion&gt;Fragmented ICMP packets can be generated by hackers for DoS attacks such as Ping O' Death and Teardrop. It is imperative that...
    Rule Medium Severity
    Show

  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The PE router must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces..

    &lt;VulnDiscussion&gt;The uRPF feature is a defense against spoofing and denial-of-service (DoS) attacks by verifying if the source address of any ...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The perimeter router must be configured to filter traffic destined to the enclave in accordance with the guidelines contained in DoD Instruction 8551.1.

    &lt;VulnDiscussion&gt;Vulnerability assessments must be reviewed by the System Administrator, and protocols must be approved by the Information Ass...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The perimeter router must be configured to filter ingress traffic at the external interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The perimeter router must be configured to filter egress traffic at the internal interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
    Show

  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
    Show

  • The BGP router must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.

    &lt;VulnDiscussion&gt;Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimu...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The PE router must be configured to block any traffic that is destined to IP core infrastructure.

    &lt;VulnDiscussion&gt;IP/MPLS networks providing VPN and transit services must provide, at the least, the same level of protection against denial-o...
    Rule High Severity
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  • The router must be configured to have Gratuitous ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the...
    Rule Medium Severity
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  • The out-of-band management (OOBM) gateway must be configured to transport management traffic to the Network Operations Center (NOC) via dedicated circuit, MPLS/VPN service, or IPsec tunnel.

    &lt;VulnDiscussion&gt;Using dedicated paths, the OOBM backbone connects the OOBM gateway routers located at the edge of the managed network and at ...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The out-of-band management (OOBM) gateway router must be configured to forward only authorized management traffic to the Network Operations Center (NOC).

    &lt;VulnDiscussion&gt;The OOBM network is an IP network used exclusively for the transport of OAM&amp;P data from the network being managed to the ...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The out-of-band management (OOBM) gateway router must be configured to block any traffic destined to itself that is not sourced from the OOBM network or the NOC.

    &lt;VulnDiscussion&gt;If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment ...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The router must be configured to only permit management traffic that ingresses and egresses the OOBM interface.

    &lt;VulnDiscussion&gt;The OOBM access switch will connect to the management interface of the managed network elements. The management interface can...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
    Group
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  • The router providing connectivity to the NOC must be configured to forward all in-band management traffic via an IPsec tunnel.

    &lt;VulnDiscussion&gt;When the production network is managed in-band, the management network could be housed at a NOC that is located remotely at s...
    Rule Medium Severity
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  • SRG-NET-000235

    <GroupDescription></GroupDescription>
    Group
    Show

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