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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-207098	SRG-NET-000018-RTR-000002	SV-207098r604135_rule		Medium

Description

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 autonomous systems.

STIG	Date
Router Security Requirements Guide	2024-05-28

Details

Check Text (C-7359r382139_chk)

Review the router configuration to verify that it will reject routes of any Bogon prefixes.

The prefix filter must be referenced inbound on the appropriate BGP neighbor statements.

If the router is not configured to reject inbound route advertisements for any Bogon prefixes, this is a finding.

Fix Text (F-7359r382140_fix)

Ensure all eBGP routers are configured to reject inbound route advertisements for any Bogon prefixes.