Remove obscure access vectors and back doors, especially modems; limit any remaining access. Where possible implement monitoring-only access enforced by data diodes (not software-enforced read-only); prohibit persistent vendor connections; require remote access to be operator-controlled, time-limited and procedurally similar to lock-out/tag-out; use the same paths for vendor and employee connections; and use two-factor authentication.
This control maps to 2 controls across 2 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 2 it maps to, and the evidence behind each claim, over MCP and REST.