The multicast edge router must be configured to establish boundaries for administratively scoped multicast traffic.
Overview
Finding ID
Version
Rule ID
IA Controls
Severity
V-207111
SRG-NET-000019-RTR-000005
SV-207111r604135_rule
Low
Description
If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel.
Administrative scoped multicast addresses are locally assigned and are to be used exclusively by the enterprise network or enclave. Administrative scoped multicast traffic must not cross the enclave perimeter in either direction. Restricting multicast traffic makes it more difficult for a malicious user to access sensitive traffic.
Admin-Local scope is encouraged for any multicast traffic within a network intended for network management, as well as for control plane traffic that must reach beyond link-local destinations.