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Indian manufacturing is undergoing a rapid digital transformation. Smart factories, Industry 4.0 automation, robotics, and connected SCADA systems are redefining how goods are produced—from auto-component plants in Pune to pharmaceutical facilities in Ahmedabad. But this connectivity is also creating an expanding attack surface that most enterprise security teams were simply not designed to protect.
Operational Technology (OT) and Industrial Control Systems (ICS) were originally built for reliability and uptime, not cybersecurity. Air-gapped networks and proprietary protocols gave them a degree of isolation for decades. That isolation is gone. The convergence of IT and OT means that a ransomware gang that compromises your enterprise network can now pivot directly into your production floor—stopping conveyors, locking HMIs, or worse, manipulating sensor readings in ways that create real-world physical hazards.
This guide is aimed at IT leaders and CISOs at Indian manufacturing organisations who know they have an OT problem but may not yet have a coherent framework for addressing it. We cover the threat landscape, the specific challenges of OT environments, and a practical, phased roadmap to meaningful protection.
Standard enterprise security tools and methodologies break when applied to OT environments. Here is why:
OT attacks are no longer theoretical. The 2021 Mumbai power grid incident, which caused a significant voltage drop, was attributed by a US threat intelligence firm to a Chinese APT group that had implanted malware in SCADA systems. While attribution in that case remains disputed, the technical finding—that grid control systems had been compromised—was not. Indian critical infrastructure is actively being surveilled and, in some cases, pre-positioned for disruption.
Beyond nation-state actors, ransomware groups have learned that OT networks are enormously valuable as leverage. Encrypting a manufacturer’s ERP is painful; encrypting the HMI that controls their bottling line creates immediate, existential production pressure to pay. Groups like LockBit, BlackCat, and their successors have demonstrated the willingness to cross the IT-OT boundary and cause physical disruption.
For Indian enterprises, the regulatory stakes are also rising. CERT-In’s 2022 directions mandate reporting of cybersecurity incidents—including those affecting industrial systems—within six hours of detection. The DPDP Act 2023, while primarily focused on personal data, has broader implications for data governance across the enterprise including OT historian data containing process parameters and production records.
You cannot protect what you cannot see. OT environments typically have poor asset inventory because industrial assets were never onboarded into CMDB or IT asset management processes.
The Purdue Model and IEC 62443 both prescribe zone-and-conduit network architecture. In practice, this means:
Segmentation reduces risk but does not eliminate it. Insider threats, supply chain compromise, and zero-days can all bypass perimeter controls. Continuous OT network monitoring is essential:
Your standard IT incident response playbook will not work in OT. You need a specialised OT-IR plan that addresses:
One of the most common gaps in OT security programmes is the disconnect between what the OT monitoring tool sees and what the enterprise SOC sees. A threat actor who spends two weeks traversing from a phishing email in the corporate network to the OT historian, and then writes a malicious command to a PLC, will leave artefacts in both domains. If your IT SIEM and your OT monitoring tool do not talk to each other, that attack path is invisible as a whole even if parts of it are visible in isolation.
This is the problem that PrahiX Ora, the unified SecOps platform we deploy and operate for clients, is designed to solve. PrahiX Ora is built by PrahiX Tech Pvt Ltd; PJ Networks is its primary field deployment and operations partner, bringing both the platform and the 24/7 NOC/SOC operations capability to manage it.
SIEM with CERT-In-aligned retention: OT syslog, historian events, firewall logs, and enterprise endpoint telemetry are all ingested into a single correlation engine. Correlation rules are mapped to MITRE ATT&CK for ICS (the OT-specific extension of the ATT&CK framework), so alerts are contextualised against known OT adversary techniques. Graph-based attack storyline reconstruction helps analysts understand the full kill chain across IT and OT domains. Critically, tiered log retention (hot/warm/cold/archive) supports CERT-In’s direction on 180-day in-country log retention—a requirement that many organisations are struggling to meet cost-effectively for high-volume OT log sources.
NMS with full OT topology visibility: The network management pillar provides unified observability across FortiGate firewalls, managed switches, access points, WAN links, and OT-adjacent infrastructure. LLDP/CDP topology discovery automatically builds and maintains network maps. ML-based anomaly detection flags unusual bandwidth patterns or new device-to-device communication paths that may indicate lateral movement. For manufacturing organisations with multi-vendor OT estates where NOC visibility is fragmented across half a dozen vendor consoles, the unified view is a significant operational improvement.
Video surveillance (VMS) integration: Physical security and network security are increasingly interconnected threats—a badge-in at 2 AM followed by a USB insertion event on an engineering workstation 10 minutes later is a correlation that matters. PrahiX Ora’s video surveillance (VMS) module supports ONVIF, Hikvision, and Dahua camera management with video analytics, bringing physical and network security events under one operations view. For manufacturing, retail, and multi-site estates where physical access to OT equipment is a real threat vector, this unified view supports faster, more complete incident investigation.
SOAR automation for CERT-In compliance: When an OT security alert fires, the clock is running. CERT-In’s 6-hour incident reporting window is not generous, and manually collecting evidence, assessing severity, escalating, and drafting a report in that window is extremely challenging without automation. The SOAR module provides pre-built playbooks with connectors to FortiGate (for automated blocklist pushes), ticketing systems, and notification channels. Playbook automation is what makes the 6-hour CERT-In timeline realistic at scale—without it, every significant incident becomes a race against the clock that the SOC team frequently loses.
If your OT security programme needs the visibility layer to bring IT and OT together, speak with the PJ Networks team about a PrahiX Ora assessment for your environment.
For Indian manufacturing organisations looking for a proven, enterprise-grade solution at the IT/OT boundary, FortiGate NGFWs with the FortiGuard OT Security Service are the platform PJ Networks has deployed across multiple industrial environments. Key capabilities include:
The single most important first step in OT security is passive network visibility. Until you know what is on your OT network and what it is communicating with, every other security control is built on guesswork.
For Indian manufacturing CISOs who want to move forward this month, we recommend starting with a focused OT Network Assessment. This is a 2-4 week engagement that deploys passive monitoring sensors to build an accurate asset inventory, identify IT/OT interconnections, and surface the highest-risk exposures. The output is a prioritised remediation roadmap with effort and cost estimates—enough to build a business case for the capital investment that deeper OT security work requires.
PJ Networks has experience across a range of Indian manufacturing sectors, including auto components, pharmaceuticals, food and beverage, and discrete manufacturing. Our team includes OT security specialists who understand the operational constraints that make “just patch everything” an impossible instruction in industrial environments.
If OT security is on your agenda for this financial year—and given the current threat landscape, it should be—connect with the PJ Networks team to discuss an OT Network Assessment for your facilities.