Secure the hybrid network your business actually runs on.
End-to-end protection for hybrid IT and OT network infrastructure. Architecture review, segmentation, threat detection, and response capability designed to keep operations running and reduce the impact of future cyber attacks. Aligned with NIST CSF, ISA/IEC 62443, the Purdue Model, and regulatory guidance for critical infrastructure.
Network protection across IT, OT, and everything between.
Most organizations have a network architecture diagram that hasn't been validated in years. New devices have been added, cloud workloads have changed how traffic flows, OT and ICS environments have crept onto the corporate network, and remote access pathways have multiplied. The documentation describes a network that may no longer exist. When an incident happens, response teams discover the gap between what was supposed to be in place and what actually is, usually under the worst possible conditions.
Armour Cybersecurity's Network Protection services close that gap. The engagement validates and documents the current state of the network across IT and OT environments, identifies architectural and operational weaknesses, builds a future-state design grounded in segmentation and zoning principles, and produces a prioritized remediation roadmap. Where OT or ICS environments are in scope, the methodology follows ISA/IEC 62443 zone-and-conduit principles, the Purdue Model, and NIST SP 800-82 guidance.
The work is technology-agnostic. Tools are selected based on the environment, not vendor relationships. All OT assessment activity is non-intrusive, using manual configuration review, walkthrough inspection, and protocol-aware tooling vetted for industrial environments. The objective is a network that is documented, segmented, monitored, and resilient under both routine operations and active attack.
A network nobody fully maps vs. an architecture that holds.
The difference between organizations that contain incidents quickly and those that watch them spread is almost always about how clearly the network is documented, segmented, and monitored when the first alert fires.
Architecture diagrams that don't match reality. Segmentation that exists on paper, not in production.
OT environments are connected to corporate networks through pathways that were supposed to be temporary. Vendor remote access has accumulated over years with no central registry. Flat networks let lateral movement happen unimpeded. Legacy systems remain exposed because nobody owns them. Firewall rules have grown into hundreds of entries nobody can audit. When the next attack lands, the response team works from documentation that describes a previous version of the network, while the actual environment surfaces new pathways the attacker is already using.
Validated architecture, enforced segmentation, monitored traffic, and a roadmap sequenced by risk.
The engagement validates the current state of the network against actual infrastructure, not outdated documentation. Segmentation and zoning are designed using ISA/IEC 62443 and the Purdue Model where OT is involved, with concrete enforcement at firewall, VLAN, and access control layers. Remote access is consolidated and hardened. Threat monitoring is extended across the network. The roadmap sequences quick wins (blocking exposed services, enforcing MFA) alongside longer-term initiatives (network redesign, vendor risk controls, policy alignment) so the team knows exactly what to address first.
What the engagement covers.
Nine integrated domains across the network protection lifecycle, calibrated to whether the organization runs primarily IT, a hybrid IT/OT estate, or critical infrastructure subject to sector-specific regulation.
Network Architecture Review
Validation of current network topology against actual infrastructure, mapping of communication patterns and control flows, identification of legacy systems and architectural weaknesses, and design of future-state architecture aligned with industry standards.
Segmentation & Zoning
Zone and conduit design using ISA/IEC 62443 principles for OT and the Purdue Model where applicable. Validation of VLAN tagging, firewall zoning, ACL configurations, and jump host segmentation for both IT and OT environments.
Firewall, IDS & IPS Configuration
Configuration review of firewalls, routers, and IDS/IPS deployments to identify misconfigurations, enhance perimeter security, and optimize rule sets for performance and clarity over years of accumulated changes.
Remote Access & VPN Security
Assessment of remote access pathways including vendor access, VPN configurations, and interconnections with corporate IT systems, with evaluation of multi-factor authentication, session logging, and session restriction controls.
OT & ICS Protection
Specialized assessment and protection of OT and ICS environments including SCADA, PLCs, HMIs, historians, and engineering workstations. Non-intrusive methodology aligned with ISA/IEC 62443, Purdue Model, and NIST SP 800-82.
Identity & Privileged Access
Review of identity and privileged access management across the network layer, including MFA practices, account lifecycle, least-privilege enforcement, and segregation of duties for accounts with cross-network reach.
Vulnerability & Patch Management
Identification of network device vulnerabilities, firmware versions, exposed services, and weak credentials, with patch management process review and recommendations tailored to the constraints of each environment.
Network Threat Monitoring
Capability assessment for network traffic monitoring, SIEM integration, anomaly detection, and threat intelligence consumption. Recommendations to extend detection coverage across both IT and OT segments.
Incident Response & Forensics
Network incident response readiness, integration of network telemetry with IR processes, forensic capability for network-layer investigation, and tabletop validation of response procedures across IT and OT scenarios.
Who this engagement serves.
Built for organizations that depend on network availability for business operations, regulatory compliance, or public safety, and that need an architecture that holds under both routine operations and active attack.
Critical Infrastructure & Utilities
Water, wastewater, energy, transportation, and other utility operators subject to EPA, DHS CISA, NERC CIP, and sector-specific guidance with OT and ICS environments requiring specialized protection.
Manufacturing & Industrial Organizations
Manufacturers, processing plants, and industrial operators with mixed IT/OT environments, vendor remote access requirements, and operational continuity demands that make uptime non-negotiable.
Regulated Industries & Financial Services
Finance, healthcare, legal, government, and other regulated organizations whose internal networks support sensitive workloads and where segmentation, monitoring, and audit-ready evidence are core requirements.
Enterprises with Hybrid Cloud + On-Premises Estates
Organizations operating across on-premises networks, hyperscaler clouds, and remote workforces, with network architectures that have grown organically and now need consolidated review and forward-looking design.
A disciplined methodology across six phases.
The engagement runs twelve to fourteen weeks across three structured phases, with six execution phases inside them. Each phase has defined inputs, outputs, and acceptance criteria. Ongoing managed monitoring continues after the engagement closes if engaged on retainer.
Discovery & Documentation
Formal kickoff with technical and operational leadership. Review of current logical and physical network architecture across IT and OT environments. Validation of documentation, asset inventories, vendor access logs, and existing security policies.
Architecture Assessment
Validation of current-state architecture against actual infrastructure, mapping of zones and conduits where OT is in scope, assessment of segmentation enforcement, remote access pathways, and interconnections between IT and OT environments.
Risk & Gap Analysis
Identification of vulnerabilities, misconfigurations, and architectural weaknesses. Threat landscape overview specific to the sector. Risk matrix quantified using likelihood and impact criteria with CVSS v3.1 scoring where applicable.
Roadmap Development
Prioritized remediation roadmap distinguishing short-term tactical fixes, medium-term initiatives, and long-term strategic projects. Future-state architecture diagrams showing improved segmentation and security control zones.
Implementation Support
Optional execution support on the highest-priority remediation items: segmentation enforcement, firewall rule cleanup, remote access consolidation, MFA expansion, monitoring extension, and network device hardening.
Continuous Monitoring & Improvement
Optional ongoing managed services covering network threat monitoring, periodic architecture reviews as the environment evolves, and integration with incident response readiness and tabletop exercise programs.
What the organization walks away with.
Nine integrated deliverables that together form a working network protection baseline. Every artifact is structured to support audit evidence, board reporting, and direct execution by internal engineering and operations teams.
Network Architecture Assessment Report
Comprehensive report covering current-state architecture, identified weaknesses, compliance gaps, and operational risks across the IT and OT environments in scope, with prioritized recommendations and budgetary guidance.
Current-State Network Diagrams
Validated logical and physical architecture diagrams updated against actual infrastructure, capturing zones, conduits, segmentation enforcement, and the interconnections between IT and OT where applicable.
Future-State Architecture Diagrams
Proposed future-state architecture showing improved zone boundaries, segmentation enforcement, firewall placement, remote access segregation, and logging improvements aligned with industry frameworks.
Risk Matrix (Likelihood × Impact)
Consolidated risk matrix rating each finding using likelihood and impact criteria, incorporating CVSS v3.1 scoring and qualitative analysis aligned with operational risk and availability requirements.
Compliance Review Matrix
Mapping of findings against applicable regulatory and framework expectations including NIST CSF, ISA/IEC 62443, EPA, DHS CISA, NERC CIP, PIPEDA, HIPAA, and PCI DSS where relevant to the organization.
Prioritized Remediation Roadmap
Sequenced remediation plan categorized into short-term tactical fixes, medium-term initiatives, and long-term strategic projects, with effort estimates, risk reduction mapping, and quick-win versus high-effort designations.
Segmentation & Zoning Model
Documented segmentation and zoning model aligned with ISA/IEC 62443 zone-and-conduit principles for OT and corporate segmentation patterns for IT, with concrete enforcement points at the firewall and VLAN layers.
Network Security Control Inventory
Inventory of firewalls, VLAN assignments, IDS/IPS deployments, ACLs, authentication gateways, and remote access methods, with operational concerns, configuration drift, and documentation weaknesses surfaced.
Executive Summary Presentation
Board-ready presentation deck tailored separately for executive leadership (top risks, public service impact, roadmap) and operational and technical teams (vulnerabilities, architecture inconsistencies, remediation tactics).
The numbers behind the work.
Founded by military intelligence veterans with senior advisors from PwC, KPMG, Deloitte, EY, and Mandiant. The track record reflects the discipline.
Clients Served
Organizations across finance, healthcare, technology, energy, legal, and government trust Armour Cybersecurity to protect what matters.
Client Retention Rate
Long-term engagements built on consistent quality, predictable delivery, and consulting relationships that compound in value over time.
Industries · Worldwide Reach
Cross-sector experience spanning every major regulated industry, with operations supporting clients across North America, Latin America, and beyond.
Cybersecurity Technology Solutions
A vetted catalogue of technology partnerships and proprietary methods deployed in support of network architecture review, OT and ICS protection, segmentation design, and managed network monitoring.
Build the network you can defend, not the one you've inherited.
Schedule a fifteen-minute discovery call to scope the engagement. Protecting What Matters starts with knowing exactly what is connected to what.
Book Discovery CallFrequently asked questions.
Common questions from CISOs, network architects, plant operations leaders, and compliance owners evaluating a Network Protection engagement.
How is this different from generic IT security or a vulnerability assessment?
Do you support OT and ICS environments as well as IT networks?
How long does a Network Protection engagement take?
Which frameworks and standards inform the methodology?
What is included in the architecture review?
How do you handle vulnerability scanning in OT environments without causing downtime?
How does Network Protection relate to your other services?
Secure the network your business depends on.
Reach out to scope a Network Protection engagement. Discovery calls are scheduled within two business days.
Talk to Armour Cybersecurity.
Toronto, ON, Canada
Request a discovery call.
Tell us about your network environment, whether OT or ICS systems are in scope, and what success looks like. A senior advisor will respond within two business days.