Industrial Network Security: Protecting Your OT Infrastructure

As industrial systems become increasingly connected, the security of Operational Technology (OT) networks has never been more critical. A breach in your industrial network can lead to production downtime, equipment damage, or even safety incidents.

The Convergence of IT and OT

Traditionally, industrial control systems were isolated from corporate networks. Today, the demand for real-time data and remote monitoring has led to increased connectivity between IT and OT environments. This convergence brings tremendous benefits but also significant security challenges.

Key Security Principles

1. Network Segmentation

Never connect your industrial control systems directly to the internet or corporate network. Implement a demilitarized zone (DMZ) architecture:

  • Level 0-1: Field devices and controllers (isolated)
  • Level 2: Supervisory systems (SCADA/HMI)
  • Level 3: Manufacturing operations
  • Level 3.5: Industrial DMZ
  • Level 4-5: Enterprise network

2. Defense in Depth

Don't rely on a single security measure. Implement multiple layers:

  • Firewalls between zones
  • Intrusion detection systems
  • Access control lists
  • Encrypted communications
  • Regular security audits

3. Access Control

  • Implement role-based access control (RBAC)
  • Use strong authentication
  • Disable default accounts and passwords
  • Monitor and log all access attempts

Common Vulnerabilities

  • Legacy systems without security updates
  • Default credentials on devices
  • Unencrypted protocols (Telnet, FTP, HTTP)
  • Flat networks without segmentation
  • Lack of monitoring and logging

Practical Steps

  1. Inventory all assets - You can't protect what you don't know exists
  2. Update and patch - Keep firmware and software current
  3. Backup configurations - Enable quick recovery after incidents
  4. Train your team - Security awareness is everyone's responsibility
  5. Test regularly - Conduct penetration tests and security assessments

UniFi for Industrial Applications

At Prodema, we're certified UniFi partners. The UniFi platform offers enterprise-grade networking with:

  • VLAN support for network segmentation
  • Centralized management
  • Built-in firewall capabilities
  • Detailed traffic analytics

Our team can help design and implement secure network architectures that meet both operational requirements and security standards.