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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-000362-RTR-000123

    <GroupDescription></GroupDescription>
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  • The Arista multicast Designated Router (DR) must be configured to increase the shortest-path tree (SPT) threshold or set it to infinity to minimalize source-group (S, G) state within the multicast topology where Any Source Multicast (ASM) is deployed.

    &lt;VulnDiscussion&gt;ASM can have many sources for the same groups (many-to-many). For many receivers, the path via the RP may not be ideal compar...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000124

    <GroupDescription></GroupDescription>
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  • The Arista BGP router must be configured to enable the Generalized TTL Security Mechanism (GTSM).

    &lt;VulnDiscussion&gt;GTSM is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-car...
    Rule Low Severity
    Show

  • SRG-NET-000364-RTR-000109

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to only allow incoming communications from authorized sources to be routed to authorized destinations.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic that poses a threat to an enclave or to other connected networks. Addition...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000110

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to block inbound packets with source Bogon IP address prefixes.

    &lt;VulnDiscussion&gt;Bogons include IP packets on the public internet that contain addresses that are not in any range allocated or delegated by t...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000111

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to have Link Layer Discovery Protocols (LLDPs) disabled on all external interfaces.

    &lt;VulnDiscussion&gt;LLDPs are primarily used to obtain protocol addresses of neighboring devices and discover platform capabilities of those devi...
    Rule Low Severity
    Show

  • SRG-NET-000364-RTR-000112

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to have Proxy ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;When Proxy ARP is enabled on a Cisco router, it allows that router to extend the network (at Layer 2) across multiple interfa...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000113

    <GroupDescription></GroupDescription>
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  • SRG-NET-000512-RTR-000007

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to block all outbound management traffic.

    &lt;VulnDiscussion&gt;For in-band management, the management network must have its own subnet in order to enforce control and access boundaries pro...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000114

    <GroupDescription></GroupDescription>
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  • The Arista multicast Designated Router (DR) must be configured to filter the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Report messages to allow hosts to join only multicast groups that have been approved by the organization.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., so...
    Rule Low Severity
    Show

  • SRG-NET-000364-RTR-000115

    <GroupDescription></GroupDescription>
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  • The Arista multicast Designated Router (DR) must be configured to filter the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Report messages to allow hosts to join a multicast group only from sources that have been approved by the organization.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., so...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000116

    <GroupDescription></GroupDescription>
    Group
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