Arista MLS EOS 4.2x Router Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000018-RTR-000004
Group -
The Arista 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 -
SRG-NET-000018-RTR-000005
Group -
The Arista BGP router must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.
Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimum, using a non-optimized path.Rule Medium Severity -
SRG-NET-000018-RTR-000006
Group -
The Arista 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 -
SRG-NET-000018-RTR-000007
Group -
SRG-NET-000018-RTR-000008
Group -
The Arista Multicast Source Discovery Protocol (MSDP) router must be configured to 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 -
SRG-NET-000018-RTR-000009
Group
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