In Part 1 of this NIS2 Compliance series, we reviewed the core requirements of the EU NIS2 Directive, including risk management, incident detection and response, business continuity, supply-chain security, and governance.
In this second part, we move from what NIS2 requires to how technical teams can put those requirements into practice.
For IT, application, and API teams, NIS2 Compliance is not a single project, checklist, or security product. It requires security to be integrated into infrastructure, cloud environments, applications, APIs, development processes, and day-to-day operations.
The goal is straightforward: reduce cybersecurity risk, detect threats earlier, respond effectively, and maintain critical services when an incident occurs.
NIS2 Compliance Guide for IT Teams
IT teams provide the foundation on which an organization's security and resilience depend.
Infrastructure, networks, endpoints, identities, and cloud environments all need appropriate protection. A practical NIS2 Compliance Guide for IT teams therefore begins with visibility and control.
Infrastructure Security
Organizations need to know what technology they operate, where it is located, who owns it, and how important it is to the business.
Asset inventory, vulnerability management, patching, network segmentation, endpoint security, and identity controls all contribute to this foundation.
Strong access controls are particularly important. Multi-factor authentication and least-privilege access can reduce the potential impact of compromised credentials, while segmentation can limit an attacker's ability to move between systems.
Simple example: An employee falls for a phishing attack and an attacker obtains their password. MFA makes it harder for the attacker to use that password, while network segmentation limits access to critical systems if the account is compromised.
These controls support NIS2 Compliance by reducing the likelihood and potential impact of a successful attack.
Cloud and DevOps Alignment
Modern infrastructure can be deployed through code and applications can move into production rapidly. Security therefore needs to be incorporated into cloud and DevOps workflows rather than being treated as a final review.
Infrastructure-as-Code scanning can identify insecure configurations before deployment. Container scanning can identify vulnerable images and packages. CI/CD security controls can help prevent known vulnerabilities from reaching production, while cloud monitoring can identify exposed resources and configuration changes.
Simple example: A developer accidentally configures a cloud storage resource to allow public access. An automated security check identifies the configuration before deployment, allowing the team to fix it before sensitive information is exposed.
This approach supports NIS2 Compliance by moving risk detection earlier in the technology lifecycle.
NIS2 Compliance Guide for Application Teams
Application teams are directly responsible for the security of software that customers, employees, and partners use.
NIS2 requirements around risk management, vulnerability handling, incident response, and resilience therefore have a direct impact on application development and operations.
Secure Software Development Lifecycle
Security should begin before an application reaches production.
A secure software development lifecycle can include threat modeling, secure coding practices, code reviews, SAST, DAST, and software composition analysis.
Threat modeling is particularly useful because it allows teams to identify how an application might be attacked before it has been deployed.
Simple example: During application design, a team realizes that a user could change an account ID in an API request and access another customer's information. The authorization problem is fixed before launch rather than becoming a production vulnerability.
Building security into development supports NIS2 Compliance by making vulnerability management part of the normal software lifecycle.
Runtime Protection
Secure development does not eliminate runtime attacks.
Once an application is live, attackers can target it with injection attacks, automated abuse, credential attacks, bots, application-layer DDoS, and attempts to exploit newly discovered vulnerabilities.
Runtime protection can include Web Application Firewalls, API protection, bot management, behavioral detection, and centralized security telemetry.
Simple example: An attacker begins sending SQL injection payloads to a public application. A WAF identifies and blocks the malicious requests while generating security events that can be investigated by the security team.
Runtime protection supports NIS2 Compliance by helping organizations prevent attacks while maintaining visibility into attempted and successful threats.
Data Protection
Application security also means protecting the information applications process.
Organizations should consider encryption for data at rest and in transit, secure key management, access controls, data classification, and audit logging.
Simple example: An attacker gains access to a database backup, but the sensitive information is encrypted. The stolen file is much less useful to the attacker than an unencrypted copy would have been.
Data protection should therefore be considered alongside application and infrastructure security as part of the wider NIS2 Compliance strategy.
NIS2 Compliance Guide for API Teams
APIs connect applications, services, cloud environments, partners, and customers. As organizations become more dependent on APIs, those interfaces become an increasingly important part of the attack surface.
A practical NIS2 Compliance Guide therefore needs to address API discovery, governance, protection, and monitoring.
API Inventory and Governance
Organizations cannot effectively secure APIs they do not know exist.
API teams should maintain an inventory of APIs, identify owners, understand what data each API handles, and establish lifecycle-management processes.
This is especially important for shadow and legacy APIs.
Simple example: A development team creates an API for an internal project. Years later, the application is replaced, but the API remains accessible. Because nobody owns or monitors it, attackers discover the forgotten endpoint and use it to access sensitive information.
API discovery and lifecycle management can prevent this type of security blind spot.
API Security Controls
API security needs to address authentication, authorization, input validation, and abuse prevention.
OAuth 2.0 and OpenID Connect can support identity and authorization architectures, but secure implementation remains essential.
Authentication answers "Who are you?"
Authorization answers "What are you allowed to access?"
Simple example: A customer is correctly authenticated to an online shopping application. They should be able to view their own order, but changing the order ID in the API request should not allow them to retrieve another customer's order.
This type of authorization control is fundamental to API security and supports effective NIS2 Compliance.
API Monitoring and Threat Detection
API protection should not stop with authentication and authorization.
Teams also need visibility into API traffic and behavior. Logging, anomaly detection, attack-pattern detection, and integration with broader security monitoring can help identify suspicious activity.
Simple example: An attacker uses stolen credentials to send hundreds of login requests through an API within minutes. Individually, the requests may appear legitimate, but the unusual volume and behavior reveal a potential credential-stuffing attack.
Monitoring helps the security team detect the activity, investigate affected accounts, and respond before the attack causes greater damage.
The Architectural Gap: Why Security Tools Alone Are Not Enough
Organizations may already have a SIEM, WAF, API security, endpoint detection, cloud security, identity controls, and DDoS protection.
The problem is that having these tools does not automatically mean that the organization has unified visibility.
Attackers move across security domains.
Simple example: An attacker steals an employee credential, accesses an API, exploits an application weakness, and then reaches a cloud resource.
The identity system sees the stolen credential.
The API system sees unusual requests.
The application security system sees the exploit.
The cloud platform sees the resource access.
If these signals remain disconnected, analysts may investigate four alerts instead of recognizing one attack.
That distinction matters for NIS2 Compliance because timely incident response depends on understanding the scope and impact of an incident.
From Detection to Understanding
The real question for technical teams is therefore not simply:
"Do we have the right security tools?"
It is:
"Can we understand what is happening across our environment when an attack is underway?"
Teams should be able to answer:
- What happened?
- How did the attacker gain access?
- Which systems were affected?
- What data or services were exposed?
- Is the attacker still active?
- What needs to be contained?
The faster these questions can be answered, the better positioned the organization is to respond.
This is especially relevant to NIS2 Compliance, given the directive's staged incident-reporting requirements. Significant incidents require an early warning within 24 hours of awareness and an incident notification within 72 hours.
How Radware Helps Customers Achieve NIS2 Compliance
Radware's position is clear: Radware helps customers achieve NIS2 Compliance by providing network and application protection capabilities that support key technical requirements.
Radware does not claim that its products alone make an organization NIS2 compliant. Compliance remains an organizational responsibility covering governance, risk management, supply-chain security, incident response, business continuity, and other areas.
Radware instead helps strengthen the technical controls supporting those responsibilities.
Radware's compliance guidance specifically identifies NIS2 and explains how its network and application availability and protection solutions can help organizations comply.
Its application protection capabilities include WAF, API protection, bot management, client-side protection, and application-layer DDoS protection.
Radware also provides an Application Protection Compliance Calculator that allows organizations to assess capabilities such as WAF, API security, bot mitigation, DDoS protection, anomaly detection, incident logging, and security-policy enforcement against NIS2-related criteria.
Simple example: An organization reviewing its NIS2 readiness discovers that its web applications have WAF protection but its APIs lack sufficient visibility and protection. That gap can become part of its remediation plan, helping the organization strengthen API security as part of its broader compliance program.
The important message is that Radware supports NIS2 Compliance efforts rather than replacing the organization's overall compliance program.
What Technical Teams Should Evaluate
A practical NIS2 readiness assessment should focus on outcomes rather than simply counting security products.
IT teams should ask:
- Do we know our critical assets?
- Can we identify and prioritize vulnerabilities?
- Are identity and access controls strong enough?
- Is our cloud environment continuously monitored?
- Are recovery processes tested?
Application teams should ask:
- Is security built into development?
- Do we perform threat modeling?
- Are vulnerabilities identified before production?
- Can we protect applications at runtime?
- Is sensitive data appropriately protected?
API teams should ask:
- Do we know every API we operate?
- Does every API have an owner?
- Can we identify shadow and legacy APIs?
- Are authentication and authorization properly enforced?
- Can we detect abnormal API behavior?
These questions provide a more meaningful view of NIS2 Compliance readiness than simply checking whether a particular product has been deployed.
Conclusion
NIS2 Compliance is ultimately about operational resilience.
IT teams need visibility and control across infrastructure and cloud environments. Application teams need security integrated into development and runtime operations. API teams need to understand and protect an increasingly important part of the organization's attack surface.
The controls should not operate as isolated checkboxes.
Organizations need security architecture that helps them prevent attacks, detect suspicious activity, understand incidents, respond quickly, and maintain critical services.
Radware helps customers achieve NIS2 Compliance by providing network and application protection capabilities that address important technical aspects of the directive. The broader compliance responsibility remains with each organization, but the right technical controls can strengthen its ability to protect applications and APIs, detect threats, maintain availability, and respond effectively.
Part 1 explained what NIS2 requires. Part 2 has shown how IT, application, and API teams can translate those requirements into practical security capabilities. Together, the two parts provide a clearer path from understanding NIS2 to building the technical foundation that supports NIS2 Compliance.