Zero Trust in Manufacturing: Safeguarding India's Industrial Networks 

Zero Trust in Manufacturing: Safeguarding India's Industrial Networks 

Every access request is a risk signal 

Manufacturing networks in India weren’t designed for today’s realities. Production is no longer confined to a physical site. Vendors log in from remote locations. Quality engineers access ERP dashboards on the go. IoT sensors stream data 24/7 across segmented plants. And cyber attackers know it. 

Industrial networks across Pune, Manesar, and Chennai are under a quiet siege. Threat actors don’t storm the gates. They walk in through misconfigured switches, unmonitored endpoints, or a trusted contractor’s compromised credentials. Legacy perimeter security does nothing here. You need a policy that trusts nothing, verifies everything, and adapts in real-time. 

That’s Zero Trust. And it's time manufacturing leaders in India stopped treating it like a concept and started implementing it as an operating model. 

Why Zero Trust fits manufacturing better than firewalls ever did 

Perimeter firewalls assume the inside is safe. But when PLCs, MES platforms, and machine controllers talk to each other across VLANs, any breach becomes lateral. That’s how ransomware moves silently from a CNC machine to your SAP deployment. 

Zero Trust shifts the model. It treats every device, user, and packet as untrusted until proven otherwise. Instead of protecting a boundary, it protects every connection. 

For manufacturing IT heads, this means: 

• Authenticating every industrial asset 
• Monitoring access between IT and OT systems 
• Enforcing identity-based segmentation 
• Applying least privilege access by role, location, and device 

The top risks hiding inside industrial networks 

Zero Trust isn't a theory. It's a response to live threats already inside your infrastructure: 

       1. Flat network topologies 
Plants often run on flat VLANs. If one device gets infected, everything else is reachable. You need micro-segmentation. 

       2. Shared credentials 
Operational teams often use generic logins across machines for convenience. If one login is stolen, your whole production system is exposed. 

       3. Vendor VPN tunnels 
Third-party access through poorly controlled VPNs creates blind spots. Most plants have no audit trail for vendor logins. 

       4. No MFA for plant users 
Admins accessing OT systems over remote links rarely face authentication challenges beyond passwords. 

       5. Shadow IoT 
Sensors, barcode scanners, and wireless edge devices, often unpatched, unmanaged, and invisible to IT. 

What Zero Trust architecture looks like in Indian factories 

Cisco Secure Access, built around a Zero Trust framework, brings in identity, context, and control. When combined with Cisco ISE and Secure Workload, it allows manufacturers to define who can access what, from where, and for how long. 

Key elements to deploy: 

• Identity-based access control using Cisco Duo and ISE 
• Continuous posture checks on plant endpoints 
• User and entity behaviour analytics (UEBA) to detect anomalies 
• Micro-segmentation using Secure Workload to isolate zones 
• Real-time telemetry integrated into a SIEM or SOAR system 

Your access policies should distinguish between an operator accessing a MES terminal in Bengaluru and a contractor logging in from a Wi-Fi network in Bhiwadi. 

What Indian CISOs care about: Compliance, visibility, speed 

Manufacturers can’t afford an outage. Period. Downtime means idle assembly lines, missed SLAs, and penalty clauses. 

We’ve seen CISOs demand: 

• Instant visibility into who accessed what system at what time 
• Role-based access rules enforceable across IT and OT 
• Real-time threat detection across legacy and modern endpoints 
• Non-disruptive rollout of Zero Trust in live production networks 

Cisco Secure Access, with Proactive’s phased deployment strategy, delivers exactly that. 

The Zero Trust adoption map for manufacturers 

Step 1: Audit access flows 
Document every user, asset, vendor, and machine connection. Start with a critical cell or process line. 

Step 2: Implement strong identity 
Roll out Cisco Duo MFA for all users. Use ISE to tie identity to device type, location, and risk profile. 

Step 3: Micro-segment OT zones 
Use Secure Workload to isolate plant networks by function. Enforce east-west traffic control. 

Step 4: Monitor and refine 
Feed telemetry to a SIEM. Detect abnormal behaviour. Update policies as production needs change. 

Step 5: Expand across plants 
Once one site is stable, replicate the model at other facilities. 

Why Indian manufacturers are adopting Zero Trust now 

• M&A pressure: Integrating new plants or suppliers securely 
• Industry 4.0 push: More data means more surface area 
• Board pressure: Post-incident boards demand clarity and auditability 
• Export compliance: Global customers demand security controls for vendor approval 

Don’t wait for a breach to draw your boundaries 

Zero Trust is not a product. It’s a decision-making model. 

Every access request, every device handshake, and every login attempt is a control point. With the right architecture, that control becomes invisible to users but absolute to attackers. 

Cisco has the stack. Proactive brings the plant-side experience. 

If you’re running manufacturing operations across Ahmedabad, Nashik, or Tiruppur, you already know the risks. What you need is a secure, deployable, and scalable way to reduce them, without breaking the line.