Get Started with OT Security

Use the following getting started sequence to install and start using OT Security.

Check Prerequisites

• Prerequisites — Review the system, hardware, virtual, and license requirements for OT Security.

  • System Requirements — Review the requirements to install and run Tenable Core + OT Security.

  • Access Requirements — Review the internet and port requirements to run Tenable Core + OT Security.

  • Network Considerations — Review the network interfaces to connect OT Security.

  • Firewall Considerations — Review the ports that must be open for OT Security to function correctly.

  • Introduction to Tenable OT Security — Go through the training material for an understanding of OT Security.

Install OT Security ICP

OT Security is an application running on top of the Tenable Core operating system, and it is subject to the base requirements of Tenable Core. Use the following guidelines to install and configure Tenable Core + OT Security.

To install OT Security:

1. Install OT Security ICP

   • Install OT Security ICP Hardware Appliance - Set up OT Security as a hardware appliance.
     Note: Tenable-provided Tenable Core hardware comes with Tenable Core+ OT Security pre-installed. If you are installing an older or dated appliance, you might opt for a clean install. For more information, see Clean Install Tenable Core + Tenable OT Security on Tenable-Provided Hardware.

   • Install OT Security ICP Virtual Appliance— Deploy Tenable Core + OT Security as a virtual machine using the pre-configured .ova file containing the standard virtual machine configuration, or customize your appliance using the installation .iso file.

2. Connect OT Security to the Network— Connect OT Security hardware and virtual appliance to the network.

3. Configure OT Security ICP

   1. Set up Tenable Core — Configure Tenable Core via CLI or the user interface.

   2. Install OT Security on Tenable Core - Manually complete the installation of Tenable OT Security in Tenable Core.

   3. Configure OT Security Settings using Setup Wizard — Use the setup wizard to configure basic settings in OT Security.

      • Log in to the OT Security console and configure the User Info, Device, System Time, and Port Separation settings.

4. Activate OT Security License — Activate your license after you complete the OT Security installation.

Use OT Security

Launch OT Security

1. Enable OT Security — Enable OT Security after you activate your license.

2. Start using OT Security — Configure your monitored networks, port separation, users, groups, authentication servers, and so on to start using OT Security.

   Tip: To gain hands-on experience and to obtain Tenable OT Security Specialist Certification, take the Tenable OT Security Specialist Course.

Expand OT Security into Tenable One

Integrate OT Security with Tenable One and leverage the following features:

• In Lumin Exposure View, reveal converged risk levels and uncover hidden weaknesses across the IT-OT boundary. You can continuously monitor and track potential vulnerabilities with enhanced OT data:

  • Review the Global exposure card to understand your holistic score. Click Per Exposure to understand what factors are driving your score, and by how much.

  • Review the Operational Technologies exposure card.

  • Configure the exposure view settings to set customized card target, and to configure your Remediation SLA and SLA Efficiency based on your company policy.

  • Create a custom exposure card based on business context, and include the new tag you created in Tenable Inventory.

• In Tenable Inventory, enrich asset discovery with OT-specific insights, such as firmware versions, vendors, models & operational states. Access OT intelligence that standard IT security tools cannot provide:

  • Review your OT assets to understand the strategic nature of the interface. This should help set your expectations on what features to use within Tenable Inventory, and when.

  • Review the Tenable Queries that you can use, edit, and bookmark.

  • Familiarize yourself with the Global Search query builder and its objects and properties. Bookmark custom queries for later use.

    Tip: To get a quick view of what properties are available:

    • In the query builder, type has. A list of suggested asset properties appears.
    • Customize the list by adding a column. A list of available columns/properties appears.
  • Drill down into the asset details page to view asset properties and all associated context views.

  • Create a new dynamic tag for your OT assets, where:

    • Operator = Host System Type

    • Value = PLC

  • (Optional) Create a tag that combines different asset classes.

• In Attack Path Analysis, expose vulnerable network paths that could disrupt key operations like production lines or data centers. You can track OT communication paths and unauthorized changes:

  • View the Attack Path Analysis Dashboard for a high-level view of your vulnerable assets such as the number of attack paths leading to these critical assets, the number of open findings and their severity, a matrix to view paths with different source node exposure score and ACR target value combinations, and a list of trending attack paths.

    • Review the Top Attack Path Matrix and click the Top Attack Paths tile to view more information about your “Crown Jewels”, or assets with an ACR of 7 or above.

    You can adjust these if needed to ensure you’re viewing the most critical attack path data and findings.

  • On the Findings page, view all attack techniques that exist in one or more attack paths that lead to one or more critical assets by pairing your data with advanced graph analytics and the MITRE ATT&CK® Framework to create Findings, which allow you to understand and act on the unknowns that enable and amplify threat impact on your assets and information.

  • On the Mitre Att&ck Heatmap, select the ICS heatmap option to focus on ICS (Industrial Control Systems) tactics and techniques.

  • On the Discover page, generate attack path queries to view your assets as part of potential attack paths:

    • Generate an Attack Path using a Built-in Query

    • Generate an Asset Query using the Asset Query Builder

    • Generate an Attack Path Query using the Attack Path Query Builder

    Then, you can view and interact with the Attack Path Query and Asset Query data via the query result list and the interactive graph.