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Tech riderRev. 5 Oct 2026

OTDefend

Ch 086.8of 17OT and ICS Security Monitoring Software
  1. 1Runs onAPI, Linux, self-hosted, Web, Windows
  2. 2Deploymenton premises
  3. 3Passive monitoringYes
  4. 4OT asset discoveryYes
  5. 5Supported protocolsModbus (TCP and RTU), S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, HART-IP
  6. 6SIEM integrationYes
6 lines stated Written from the maker's own pages: otdefend.com
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The OTDefend homepage

Overview

OTDefend provides passive monitoring, threat detection, vulnerability management, and response for industrial environments. Its network intrusion detection inspects more than 16 industrial protocols from a mirror or TAP port, and the maker says it does not inject traffic. Supported protocols include Modbus, S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, and HART-IP. A dependency-free Windows agent runs from Windows XP through Windows 11 and collects host inventory and intrusion-detection events. Detection combines network IDS signatures, Sigma analytics, and YARA signatures; the homepage states 688 rules. A built-in threat-intelligence store accepts TAXII 2.1 and STIX 2.1 feeds and checks indicators against live traffic. Deployment options include an offline Docker bundle, a .deb sensor, and a bootable appliance ISO. OTDefend lists SIEM and other security integrations, plus IEC 62443, NERC CIP, and NIS2 reporting with exportable PDFs. Its design includes per-tenant isolation, role-based access, an active/standby core, and one-way sensors for data-diode segments. Pricing is on request.

Who it is for

OTDefend is intended for critical infrastructure settings such as energy, manufacturing, water, and oil and gas. It suits teams seeking passive OT monitoring and integrations with listed security and service-management systems.

What is good

  • Passive inspection through a mirror or TAP port.
  • Lists more than 16 industrial protocols.
  • Windows agent covers Windows XP through Windows 11.
  • Accepts TAXII 2.1 and STIX 2.1 feeds.
  • Offers exportable IEC 62443, NERC CIP, and NIS2 reports.

What to know first

  • Pricing is available on request.
  • Technical support hours are Monday–Friday, 9:00 AM–6:00 PM, with emergency coverage plan-dependent.
  • The standard demo lasts about 45–60 minutes.

Verdict

OTDefend specifies passive network monitoring, host collection, threat-intelligence feeds, and deployment options for industrial environments. Confirm pricing and support-plan terms for emergency support before choosing it.

OTDefend plans and pricing

All plans
Custom solution Solution proposal and pricing tailored to your needs otdefend.com · 5 Oct 2026

Compared on OT and ICS security monitoring software

Deployment
on_premisesotdefend.com
Passive monitoring
Yesotdefend.com
OT asset discovery
Yesotdefend.com
Supported protocols
Modbus (TCP and RTU), S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, HART-IPotdefend.com
SIEM integration
Yesotdefend.com

Facts

Purpose
OTDefend provides passive OT/ICS monitoring, threat detection, vulnerability management and response for industrial environments.otdefend.com · 5 Oct 2026
Network inspection
Its passive network IDS inspects 16+ industrial protocols from a mirror or TAP port and says it does not inject traffic.otdefend.com · 5 Oct 2026
Windows agent
A dependency-free agent runs on Windows XP through Windows 11 and collects host inventory and intrusion-detection events.otdefend.com · 5 Oct 2026
Threat intelligence
The built-in threat-intelligence store accepts TAXII 2.1 and STIX 2.1 feeds and matches indicators against live traffic.otdefend.com · 5 Oct 2026
Detection content
The detection engine combines network IDS signatures, Sigma analytics and YARA signatures, with 688 rules stated on the homepage.otdefend.com · 5 Oct 2026
Integrations
Listed integrations include Splunk, IBM QRadar, CrowdStrike Falcon, Microsoft Defender, SentinelOne, ServiceNow, Jira, Fortinet FortiGate, Palo Alto Networks and Check Point.otdefend.com · 5 Oct 2026
Compliance
The platform lists IEC 62443, NERC CIP and NIS2 compliance reporting, including exportable PDF reports.otdefend.com · 5 Oct 2026
Security design
The platform describes per-tenant isolation, role-based access, an active/standby core and one-way sensors for data-diode segments.otdefend.com · 5 Oct 2026
Support
Technical support is listed for Monday–Friday, 9:00 AM–6:00 PM, with emergency 24/7 support based on the support plan.otdefend.com · 5 Oct 2026
Training
OTDefend says it offers online and on-site training programs.otdefend.com · 5 Oct 2026
Free demo
OTDefend offers a free personalized demo and consultation, with no obligation; the site says standard demos last about 45–60 minutes.otdefend.com · 5 Oct 2026
Audience
The site describes OTDefend for critical infrastructure sectors including energy, manufacturing, water, and oil and gas.otdefend.com · 5 Oct 2026

Company

Founded
2025otdefend.com · 28 Sept 2026
Headquarters
Ankara, Turkeyotdefend.com · 28 Sept 2026

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