New Zealand Information Security Manual (NZISM) 19.4.5.C.03: EAL2 or PP diode for domestic NZEO connections

What does 19.4.5.C.03 require?

Agencies should use a diode evaluated to at least EAL2, or to a Protection Profile, when linking an NZEO network with a different network under New Zealand control where both sit in one security domain.

Maintained by Gerard BlokdykVerified against the published standard 31 May 2026Control text last updated 21 May 2026

Other controls in Chapter 19: Gateway security – New Zealand Information Security Manual (NZISM)

19.1.10.C.01 19.1.10.C.01 Cascaded gateway chains meet end-to-end assurance levels
19.1.11.C.01 19.1.11.C.01 Gateways protect, filter and are physically secured
19.1.11.C.02 19.1.11.C.02 Shared gateway components managed by highest domain owner
19.1.12.C.01 19.1.12.C.01 Gateway configuration: sole path, default deny, isolated management
19.1.13.C.01 19.1.13.C.01 Operating gateways between different security domains
19.1.14.C.01 19.1.14.C.01 Use demilitarised zones for externally accessed systems
19.1.14.C.02 19.1.14.C.02 Host externally accessed systems in demilitarised zones
19.1.15.C.01 19.1.15.C.01 Risk assessment before gateway implementation

Query this from an agent

The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.

MCP endpoint All New Zealand Information Security Manual (NZISM) controls