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Check: NET2001

Network Infrastructure Policy STIG: NET2001 (in versions v10 r7 through v9 r2)

Title

Multi-Protocol Labeled Switching (MPLS) labels must not be exchanged between the enclaves edge routers and any external neighbor routers. (Cat II impact)

Discussion

MPLS label exchange via Label Distribution Protocol (LDP) or Resource Reservation Protocol (RSVP) with any external neighbor creates the risk of label spoofing that could disrupt optimum routing, or even drop packets that are encapsulated with a label that is not in the MPLS forwarding table.

Check Content

Review the DISN-facing interfaces of the enclave perimeter routers to verify that LDP or RSVP is not enabled. If any of these interfaces are LDP or RSVP enabled, this is a finding.

Fix Text

Disable LDP and RSVP on DISN-facing interfaces on all perimeter routers.

Additional Identifiers

Rule ID: SV-251384r806107_rule

Vulnerability ID: V-251384

Group Title: NET2001

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CCIs

CCIs tied to check.

Number	Definition
CCI-001097	Monitor and control communications at the external managed interfaces to the system and at key managed interfaces within the system.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
SC-7	Boundary Protection