TroutTrout

Risk Matrix and Subnet Labels

Tag your networks and assets with impact and risk levels so alerts, policies, and reports reflect what actually matters.

3 min read · Last updated 2026-04-22

A flat list of 800 assets does not help an operator decide what to look at first. Access Gate lets you tag networks (vnets) and assets with an impact and a security level and carry that tag through every screen: the asset inventory, the alerts view, the ACL editor, the reports you export. That's what the risk matrix and vnet labels are for.

The Risk Matrix at a Glance

The risk matrix is a two-axis grid: likelihood × impact. Every asset lands in one cell.

Low impactMedium impactHigh impactCritical
RareInformationalMonitorInvestigatePriority
LikelyMonitorInvestigatePriorityUrgent
FrequentInvestigatePriorityUrgentUrgent
  • Impact is a property of the asset — you set it once and it stays.
  • Likelihood is derived from traffic, detection signal, and open ports.

This is how the Alerts view sorts events: a low-severity alert on a Critical asset outranks a high-severity alert on a lab workstation.

Setting Security Level on an Asset

Set impact for an asset
  1. Navigate to Assets → [Your Asset].
  2. Click the pencil icon → Edit overview.
  3. Pick Security Level: Low, Medium, High, Critical.
  4. Save.Adding Security level on an Asset

The Security Level tag propagates to every alert and report referencing that asset.

Set impact for a user
  1. Navigate to Users → [Your User].
  2. Click the pencil icon → Edit overview.
  3. Pick Security Level: Low, Medium, High, Critical.
  4. Save.

The Security Level tag propagates to every alert and report referencing that user.

Subnet Labels

A Subnet is a logical network — an overlay range, a monitored VLAN, a zone. For each subnet, you should define the impact: limited, moderate, strong & critical. This Impact will allow to prioritize alerts and enforce policies.

Setting Labels on a Subnet

Label a Subnet
  1. Navigate to Settings → Subnets → [Your subnet].
  2. Click the pencil icon.
  3. Select a value from the Impact dropdown.
  4. Save. Setting Impact on a Subnet

How Security Level and Impact Flow Through the Product

SurfaceUses labels for
Alerts viewSort and filter by impact; highlight alerts on critical assets
ACL editorRestrict rule targets by security levels
DetectionTune rule sensitivity — noisier rules only fire on lower-impact assets
Log exportForward high-impact streams to the SIEM, archive the rest

Keeping the Matrix Accurate

The risk matrix is only useful if it reflects current reality. A few habits that keep it honest:

  • Review quarterly — walk through critical and high assets with the asset owner.
  • Tie to change control — onboarding a new production asset should set impact before the asset goes live.
  • Purge stale labels — the monthly missing-asset report (see Detection and alerts) is a good moment to remove tags from decommissioned devices.