Juniper EX Series Switches Router Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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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 -
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 -
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 -
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 -
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 -
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 -
The Juniper router must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.
If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel. Limiting where, within the network, a given multic...Rule Medium Severity -
The Juniper perimeter router must not be configured to be a Border Gateway Protocol (BGP) peer to an alternate gateway service provider.
ISPs use BGP to share route information with other autonomous systems (i.e., other ISPs and corporate networks). If the perimeter router was configured to BGP peer with an ISP, NIPRNet routes could...Rule High Severity -
The Juniper perimeter router must not be configured to redistribute static routes to an alternate gateway service provider into BGP or an IGP peering with the NIPRNet or to other autonomous systems.
If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow to...Rule Low Severity -
The Juniper out-of-band management (OOBM) gateway router must not be configured to redistribute routes between the management network routing domain and the managed network routing domain.
If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries; otherwise, it is possib...Rule Medium Severity
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