This policy establishes the formal requirements for protecting all organizational networks—including physical, virtual, and cloud—from unauthorized access and misuse. It enforces layered controls like segmentation, firewall management, and secure routing to protect data in transit and align with ISO 27001.
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Implement a Zero-Trust Architecture: Enforce network segmentation and a deny-by-default firewall posture to prevent lateral movement and contain threats.
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Secure Your Network Perimeter: Deploy and maintain next-generation firewalls, intrusion prevention systems (IPS), and secure remote access (VPN) gateways.
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Protect Data in Transit: Mandate the use of strong encryption protocols like TLS for all internal and external communications, safeguarding data confidentiality.
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Gain Full Network Visibility: Require centralized logging and monitoring of all network traffic to enable real-time threat detection and incident response.
Read Full Overview
The Network Security Policy is designed to safeguard both internal and external organizational networks from unauthorized access, data interception, and misuse. It provides a structured approach to network security by implementing layered controls, such as segmentation, firewall enforcement, and secure routing. This policy applies to all networking infrastructure components, including routers, switches, wireless access points, cloud virtual networks, and supporting systems like DNS and proxy servers.
What's Inside
- Purpose and Scope
- Roles and Responsibilities
- Network Segmentation & Zoning
- Firewall & Perimeter Security
- Secure Routing & Wireless Controls
- Cloud & Hybrid Network Security
- Risk Treatment and Exceptions
Built for Leaders, By Leaders
This policy was authored by a security leader with 25+ years of experience deploying and auditing ISMS frameworks for global enterprises. It's designed not just to be a document, but a defensible framework that stands up to auditor scrutiny.
Authored by an expert holding:
Framework Compliance
🛡️ Supported Standards & Frameworks
This product is aligned with the following compliance frameworks, with detailed clause and control mappings.
| Framework | Covered Clauses / Controls |
|---|---|
| ISO/IEC 27001:2022 | Clause 8.1 |
| ISO/IEC 27002:2022 | Controls 8.20-8.22 |
| NIST SP 800-53 Rev.5 | SC-7, AC-4, SC-32 |
| EU GDPR | Article 32 |
| EU NIS2 | Article 21(2)(d) |
| EU DORA | Article 9 |
| COBIT 2019 | DSS01.03, DSS05.01, MEA03 |
Part of a Complete ISMS Toolkit
This policy is one of 37 documents in our complete toolkit. When implemented as a set, our framework helps you achieve comprehensive compliance across major standards.
100%
ISO 27001
95%
NIST
88%
NIS2
75%
DORA
70%
GDPR
Related Policies
This policy integrates with the following documents to form a multi-layered defense-in-depth strategy.
Access Control Policy (P4)
Ensures network access aligns with user roles and least privilege principles.
Change Management Policy (P5)
Regulates firewall rule changes and routing adjustments.
Risk Management Policy (P6)
Assesses risks associated with network architecture and traffic flows.
Asset Management Policy (P12)
Ensures all connected network devices are inventoried and managed.
Incident Response Policy (P30)
Defines procedures for responding to network-based threats or intrusions.
About This Policy
The Clarysec Network Security Policy provides the comprehensive framework needed to protect your organization’s digital perimeter and internal networks. Aligned with ISO 27001 controls 8.20, 8.21, and 8.22, it mandates critical safeguards like network segmentation, deny-by-default firewall rules, and secure routing configurations. This policy is essential for preventing unauthorized access and containing the lateral movement of threats.
By implementing these structured controls, your organization can ensure the confidentiality, integrity, and availability of data as it transits your network. The policy provides a defensible and auditable approach to network security that meets the requirements of GDPR, NIS2, and DORA. It is a fundamental building block for a zero-trust architecture and a resilient security posture.
