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Assessment Title
Rule Text
The 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.
Description
Discussion Text
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 routers connected to the Internet or other external networks could be breached and used to launch a prefix de-aggregation attack. Without ingress route filtering of customers, the effectiveness of such an attack could impact the entire IP core and its customers.
This requirement also applies to Zero Trust initiatives.
This requirement also applies to Zero Trust initiatives.
New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.