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Arista MLS EOS 4.2x Router Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000205-RTR-000002

    <GroupDescription></GroupDescription>
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  • The Arista 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
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  • SRG-NET-000205-RTR-000003

    <GroupDescription></GroupDescription>
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  • The Arista 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-RTR-000005

    <GroupDescription></GroupDescription>
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  • The Arista 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-RTR-000006

    <GroupDescription></GroupDescription>
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  • The Arista 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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  • SRG-NET-000205-RTR-000008

    <GroupDescription></GroupDescription>
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  • The Arista 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-RTR-000010

    <GroupDescription></GroupDescription>
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  • The out-of-band management (OOBM) Arista 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-RTR-000011

    <GroupDescription></GroupDescription>
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  • The out-of-band management (OOBM) Arista 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-RTR-000012

    <GroupDescription></GroupDescription>
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  • The Arista router must be configured to only permit management traffic that ingresses and egresses the out-of-band management (OOBM) interface.

    &lt;VulnDiscussion&gt;The OOBM access router 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-RTR-000014

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to restrict it from accepting outbound IP packets that contain an illegitimate address in the source address field via egress filter or by enabling Unicast Reverse Path Forwarding (uRPF).

    &lt;VulnDiscussion&gt;A compromised host in an enclave can be used by a malicious platform to launch cyberattacks on third parties. This is a commo...
    Rule High Severity
    Show

  • SRG-NET-000230-RTR-000002

    <GroupDescription></GroupDescription>
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  • The Arista BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.

    &lt;VulnDiscussion&gt;If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It i...
    Rule Medium Severity
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