SC2: Servers with Level 4 information must be on private address space, whether the system is managed directly by Harvard or via contract with a third-party service provider for Harvard's use (e.g. IaaS, SaaS). See also: Level 4, 8, Servers C, Level 4
Use private address space for Level 4 Servers that store or process level 4 data must be configured to only use private addresses as defined in IETF RFC 1918.