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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000018-RTR-000001

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  • The Juniper router must be configured to enforce approved authorizations for controlling the flow of information within the network based on organization-defined information flow control policies.

    Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so i...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000002

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  • The Juniper BGP router must be configured to reject inbound route advertisements for any Bogon prefixes.

    Accepting route advertisements for Bogon prefixes can result in the local autonomous system (AS) becoming a transit for malicious traffic as it will in turn advertise these prefixes to neighbor aut...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000003

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  • The Juniper BGP router must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).

    Accepting route advertisements belonging to the local AS can result in traffic looping, being black holed, or at a minimum using a nonoptimized path.
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000004

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  • The Juniper BGP router must be configured to reject inbound route advertisements from a customer edge (CE) router for prefixes that are not allocated to that customer.

    As a best practice, a service provider should only accept customer prefixes that have been assigned to that customer and any peering autonomous systems. A multi-homed customer with BGP speaking rou...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000005

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  • The Juniper BGP router must be configured to reject outbound route advertisements for any prefixes that do not belong to any customers or the local autonomous system (AS).

    Advertisement of routes by an AS for networks that do not belong to any of its customers pulls traffic away from the authorized network. This causes a denial of service (DoS) on the network that al...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000006

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  • The Juniper BGP router must be configured to reject route advertisements from BGP peers that do not list their autonomous system (AS) number as the first AS in the AS_PATH attribute.

    Verifying the path a route has traversed will ensure the IP core is not used as a transit network for unauthorized or possibly even internet traffic. All autonomous system boundary routers (ASBRs) ...
    Rule Low Severity
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  • SRG-NET-000018-RTR-000007

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  • The Juniper router configured for Multicast Source Discovery Protocol (MSDP) must filter received source-active multicast advertisements for any undesirable multicast groups and sources.

    The interoperability of BGP extensions for interdomain multicast routing and MSDP enables seamless connectivity of multicast domains between autonomous systems. MP-BGP advertises the unicast prefix...
    Rule Low Severity
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  • SRG-NET-000018-RTR-000008

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  • The Juniper router configured for Multicast Source Discovery Protocol (MSDP) must filter source-active multicast advertisements to external MSDP peers to avoid global visibility of local-only multicast sources and groups.

    To avoid global visibility of local information, there are a number of source-group (S, G) states in a PIM-SM domain that must not be leaked to another domain, such as multicast sources with privat...
    Rule Low Severity
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  • SRG-NET-000018-RTR-000009

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  • The Juniper router configured for MSDP must limit the amount of source-active messages it accepts on per-peer basis.

    To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP router, the router must be configured to limit the number of source-active messages it accepts from each peer.
    Rule Low Severity
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  • SRG-NET-000018-RTR-000010

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  • The Juniper router configured for BGP must reject route advertisements from CE routers with an originating AS in the AS_PATH attribute that does not belong to that customer.

    Verifying the path a route has traversed will ensure that the local AS is not used as a transit network for unauthorized traffic. To ensure that the local AS does not carry any prefixes that do not...
    Rule Low Severity
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