SC-07(04) External Telecommunications Services

(a) Implement a managed interface for each external telecommunication service;

(b) Establish a traffic flow policy for each managed interface;

(c) Protect the confidentiality and integrity of the information being transmitted across each interface;

(d) Document each exception to the traffic flow policy with a supporting mission or business need and duration of that need;

(e) Review exceptions to the traffic flow policy sc-07.04_odp and remove exceptions that are no longer supported by an explicit mission or business need;

(f) Prevent unauthorized exchange of control plane traffic with external networks;

(g) Publish information to enable remote networks to detect unauthorized control plane traffic from internal networks; and

(h) Filter unauthorized control plane traffic from external networks.

Parameter ID Definition
sc-07.04_odp frequency



External telecommunications services can provide data and/or voice communications services. Examples of control plane traffic include Border Gateway Protocol (BGP) routing, Domain Name System (DNS), and management protocols. See [SP 800-189](#f5edfe51-d1f2-422e-9b27-5d0e90b49c72) for additional information on the use of the resource public key infrastructure (RPKI) to protect BGP routes and detect unauthorized BGP announcements.

Related controls 5