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Control Module - FIRE

FV-Relay. A path that exists only for the work.

Relay turns access from a permanent state into a temporary, purposeful event. A connection exists for the work that needs it, under the conditions that suit it, for the window it requires, and then it does not.

Back to Control

Control Module - FIRE

The safest connection is the one that did not need to exist five minutes ago and will not exist five minutes from now.

Time-bound

Every connection has a defined start and end

Purposeful

Each path is opened for a specific, recorded reason

Conditional

Opening depends on identity, approval and state

Self-closing

Windows end automatically, no manual cleanup

The Problem

Standing access is the cost of yesterday's convenience.

Persistent jump paths

Paths opened for a one-off task tend to stay open. They become part of the environment, available to anyone who later finds them, attacker or otherwise.

Implicit privilege

Always-on connectivity quietly becomes always-on privilege. The original purpose is forgotten long before the route is closed.

Manual cleanup fails

Cleanup that depends on someone remembering to close a path is cleanup that does not happen reliably.

The Scenario

Scenario: vendor maintenance, on the clock

A maintenance partner needs access to an operations system for a scheduled patching window. Rather than enabling a persistent VPN, the responsible owner approves a Relay session bound to that partner, to that system, for that window. The path opens at the agreed time, the work is performed, the path closes automatically when the window expires. No artefacts are left behind for someone else to find later.

"Relay made vendor access a calendar entry rather than a standing arrangement."

FV-Relay in placement

Where Relay creates a time-bound path.

Relay is the controlled opening of a normally severed conduit. It exists for the time the work needs, no longer, and closes on its own.

Grounded in IEC 62443-3-3 SR 1.13 Access via Untrusted Networks, NIST CSF PR.AC-3 and ISO 27001 A.5.15.

Inputs ─┐Telemetry ─┐

FV-Relay

Control layer

┌─ Outputs┌─ Control
01SR 1.13

Vendor maintenance window

Opens a vendor path with a fixed start time, fixed duration and fixed scope. Closes automatically.

02PR.AC-3

Operator emergency access

Provides time-bound break-glass access for incident response, with multi-party approval and full audit.

03PR.IP-4

Backup and replication windows

Brings the recovery vault online for the replication window only. The conduit is severed before the window expires.

04A.5.15

Audit and assessment sessions

External auditors get a scoped, time-bound path into the evidence set, never to live production.

Relies on · prerequisites

  • A trustworthy time source the relay cannot be tricked about
  • Hard automatic close, not a reminder
  • Independent record of who opened it, why and for how long

Pairs with · companion modules

FirebreakLockExecuteValidate

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Key Capabilities

Defined windows

Every Relay session has an explicit start time and end time, with the end enforced automatically.

Purpose-bound

Sessions are tied to a named purpose, owner and scope rather than to a generic always-on tunnel.

Approval-gated

Opening a path requires the right approval pattern for that path, not just the requester's intent.

Scoped reach

Sessions reach only the systems the work requires, not the wider zone they happen to traverse.

Self-closing

When the window ends, the path closes. There is no manual cleanup to remember and nothing left for someone to discover later.

Evidential record

Each session is recorded through Archive, including who requested it, who approved it and what occurred.

Demo to Live

Adoption Guide

Step 1

Identify standing paths

Inventory the connections that are currently always-on and categorise them by who they serve and why.

Step 2

Design the sessions

Define the purposes, owners, approval patterns and acceptable windows for each category.

Step 3

Pilot with one workflow

Move a single standing path to a Relay session pattern, including the calendar, approval and evidential pieces.

Step 4

Decommission the rest

Migrate remaining standing access onto Relay sessions and close the persistent paths.

Step 1

Identify standing paths

Inventory the connections that are currently always-on and categorise them by who they serve and why.

Step 2

Design the sessions

Define the purposes, owners, approval patterns and acceptable windows for each category.

Step 3

Pilot with one workflow

Move a single standing path to a Relay session pattern, including the calendar, approval and evidential pieces.

Step 4

Decommission the rest

Migrate remaining standing access onto Relay sessions and close the persistent paths.

Questions

Frequently Asked

    Relay

    Controlled data relay module for OT environments.

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