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EC-Council Certified Network Defender (CND)
Defending networks takes more than basic technical knowledge. The CND course sharpens your eye for real-world attack patterns, introduces proven defense strategies, and gives you the skills to handle security incidents with confidence.
Key topics
- Designing and evaluating secure network architectures.
- Analyzing threat models and applying targeted countermeasures.
- Monitoring, log analysis, and structured incident handling.
- Deploying firewalls, IDS/IPS, and advanced security solutions.
- Hardening measures, access control, and policy enforcement.
- Coordination between operations, security teams, and compliance.
Prerequisite
If you have a working understanding of network technologies and operating systems and some hands-on experience in IT operations, you're ready to get started.
Target group
People from network operations, system administration, or security operations who don't just want to know about network security – but want to apply it precisely and systematically.
Lasting network security comes from the interplay of technology, processes, and clear security awareness. You'll gain practical knowledge that enables you to assess modern cyber threats and respond to them effectively.
Course content
Attack techniques and network defense strategies
- Key terminology in network security and threat landscapes
- Common techniques used in network-based attacks
- Methods targeting applications and services
- Social manipulation and phishing approaches
- Threats delivered via email channels
- Security vulnerabilities in mobile environments
- Attack vectors specific to cloud infrastructure
- Risks and exploits in wireless networks
- Offensive hacking frameworks and methodologies
- Goals and barriers in effective network defense
- Flexible approaches to adaptive security
- Layered protection using defense-in-depth principles
Governance, compliance and security policy
- Navigating legal requirements and industry standards
- Examining applicable laws and regulatory frameworks
- Developing and maintaining security guidelines
- Delivering security awareness and training programs
- Applying administrative controls and security measures
Access control, encryption and network protocols
- Core principles and models governing access control
- Managing identities and permissions in distributed environments
- Identity and access management (IAM) frameworks
- Applying cryptographic techniques to protect data
- Comparing and selecting cryptographic algorithms
- Benefits of network segmentation for reducing attack surfaces
- Key tools and technologies for network protection
- Critical protocols underpinning secure communications
Firewall deployment and IDS/IPS implementation
- Security challenges of firewalls: capabilities and constraints
- Comparing firewall technologies and deployment scenarios
- Firewall topologies and how to apply them effectively
- Hardware, software, host-based and network-based firewalls
- Choosing firewalls based on deep traffic inspection requirements
- Steps for deploying and configuring firewalls
- Best practices for a secure firewall setup
- Approaches to ongoing firewall administration
- Role, capabilities and limitations of IDS deployment
- IDS classification and detection approaches
- Components of intrusion detection systems and their functions
- Network-based and host-based IDS in practice
- Handling false positives and negatives in IDS/IPS
- Criteria for selecting appropriate IDS/IPS solutions
- NIDS vs. HIDS: a practical comparison
- Using Snort as an open-source security solution
- Hardening routers and switches with security best practices
- Zero trust architecture using software-defined perimeter (SDP)
Hardening Windows systems and services
- Architecture and security fundamentals of Windows operating systems
- Core Windows security components and their roles
- Built-in Windows security features and capabilities
- Configuring Windows systems for a secure baseline
- Managing user accounts and enforcing password policies
- Keeping Windows systems current through patch management
- Controlling and auditing user access rights
- OS-level hardening techniques for Windows environments
- Securing Active Directory with proven best practices
- Protecting Windows network services and communication protocols
Linux system hardening and secure access
- Linux architecture and relevant security considerations
- Safely installing and keeping Linux systems up to date
- Hardening the Linux environment against unauthorized access
- Controlling user access rights and enforcing password policies
- Securing network communications and remote access channels
- Leveraging Linux-native security tools and frameworks
Enterprise mobile device policies and controls
- Mobile usage in corporate environments: common policy approaches
- Identifying security risks associated with mobile devices in business
- Enterprise mobile security management platforms and tools
- Enforcing security policies and best practices for mobile platforms
- Android-specific security guidelines and toolsets
- iOS-specific security guidelines and toolsets
IoT security challenges and protective measures
- Types of IoT devices and their use cases across industries
- IoT ecosystem architecture and communication models
- Security risks and vulnerabilities inherent to IoT environments
- Approaches for securing IoT deployments effectively
- Protective measures tailored to IoT-connected IT infrastructure
- IoT security tools and established best practices
- Relevant IoT security standards and industry initiatives
Application security and web application firewalls
- Controlling applications through allowlisting and blocklisting
- Isolating applications using sandboxing techniques
- Keeping applications secure through patch management
- Protecting web applications with a web application firewall (WAF)
Securing data throughout its lifecycle
- Foundational concepts of data security and classification
- Enforcing data access controls and permissions
- Protecting stored data through encryption at rest
- Securing data in motion with encryption in transit
- Obscuring sensitive information via data masking
- Strategies for data backup, retention and archiving
- Secure data destruction methods and concepts
- Preventing unauthorized data exfiltration and loss
Virtual network and container security
- Network and security management in virtualized IT environments
- Foundational concepts of virtualization technology
- Securing network virtualization (NV) deployments
- Security considerations for software-defined networking (SDN)
- Protecting network function virtualization (NFV) environments
- OS-level virtualization security techniques
- Security guidelines and best practices for containers
- Hardening Docker environments against threats
- Securing Kubernetes clusters with proven best practices
Cloud security across AWS, Azure and GCP
- Core concepts and service models of cloud computing
- Security challenges and considerations in cloud environments
- Evaluating cloud service provider (CSP) security postures
- Security controls and configurations in AWS
- Securing workloads in Microsoft Azure
- Implementing security measures on Google Cloud Platform
- Cloud security best practices and recommended tooling
Wireless encryption and authentication controls
- Core principles and standards of wireless networking
- Encryption protocols for protecting wireless communications
- Authentication mechanisms in wireless network environments
- Applying security controls to harden wireless networks
Network traffic monitoring and analysis tools
- Why network monitoring matters and the benefits it delivers
- Building an effective network monitoring environment
- Defining traffic baselines and identifying suspicious patterns
- Using Wireshark to capture and analyze network traffic
- Tools and techniques for measuring network performance and bandwidth
Log analysis across systems and platforms
- Core concepts and principles of logging in IT environments
- Monitoring and reviewing logs on Windows systems
- Log collection and analysis on Linux platforms
- Examining system logs on macOS
- Analyzing firewall logs for security insights
- Log review and monitoring on routers
- Web server log analysis techniques
- Centralized log management and correlation
Incident handling and digital forensics
- Principles and phases of effective incident response
- Responsibilities of the first responder at an incident scene
- Critical do's and don'ts in the initial response phase
- Structured incident handling and response procedures
- Conducting forensic investigations to uncover evidence
Business continuity and disaster recovery planning
- Core concepts behind business continuity (BC) and disaster recovery (DR)
- Key activities involved in BC/DR planning and execution
- Developing a business continuity plan (BCP) and disaster recovery plan (DRP)
- Relevant BC/DR standards and frameworks
Risk management and vulnerability assessment
- Foundational concepts of IT risk management
- Working with structured risk management programs
- Exploring risk management framework (RMF) models
- Implementing vulnerability management processes
- Assessing and scanning systems for vulnerabilities
Attack surface management and threat simulation
- Understanding the concept and scope of an attack surface
- Mapping and visualizing an organization's attack surface
- Detecting indicators of exposure (IoE) across environments
- Running simulated attacks to validate defenses
- Strategies for reducing and managing the attack surface
- Attack surface analysis in cloud and IoT contexts
Threat intelligence and proactive cyber defense
- How threat intelligence strengthens defensive capabilities
- Categories and sources of actionable threat intelligence
- Identifying and applying IoCs and IoAs in practice
- Strategic, tactical and operational levels of threat intelligence
- Leveraging threat data to anticipate and counter attacks
Up to 100% funding for your continuing education
Attractive funding opportunities are available for numerous continuing education programs – depending on the funding program, up to 100% funding is possible.
The requirement is that you live or work in Germany. Our funding opportunities are not available outside of Germany.
Funding opportunities are available for career starters, job seekers, career changers, startups, experienced professionals, those seeking career advancement, and specialists.
What does the CND certification stand for?
- The CND is a globally recognized IT certification focused on network security. It validates the expertise needed to defend IT infrastructures against attacks and respond to security incidents effectively.
Who benefits most from CND training?
- Network administrators, IT professionals, and security specialists who want to systematically protect networks and respond to threats with confidence – in both corporate and government environments.
What are the core topics covered in the CND?
- Network security, firewall configuration, VPN management, intrusion detection, vulnerability analysis, cyber defense strategies, forensic investigation, and network monitoring.
What background should I bring to the CND course?
- Hands-on experience with network infrastructure or IT system administration is a strong foundation. A working knowledge of network technologies and IT security concepts makes it easier to get up to speed quickly.
What does the CND certification mean for my career?
- The CND strengthens your professional profile and expands your opportunities in network security, incident response, and cyber defense roles – with international recognition across industries.
Is CND training worthwhile for organizations?
- Yes. Certified staff detect threats earlier, respond more decisively, and protect network infrastructure more effectively – a direct benefit for the organization's security posture.
What career paths open up with the CND?
- The CND opens doors to roles in IT security, network administration, security operations centers (SOC), incident response, and cyber defense – with recognition from employers worldwide.
