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Network Management in Security Management

Network Management in Security Management

$249.00
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Self-paced • Lifetime updates
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Includes a practical, ready-to-use toolkit containing implementation templates, worksheets, checklists, and decision-support materials used to accelerate real-world application and reduce setup time.
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This curriculum spans the technical and procedural rigor of a multi-workshop security architecture engagement, covering the design, operation, and audit of network controls across discovery, segmentation, change management, and automated response—comparable to the scope of an internal network security program in a regulated enterprise.

Module 1: Network Infrastructure Assessment and Discovery

  • Conduct authenticated and unauthenticated network scans to identify all active devices, including rogue or unauthorized endpoints, while minimizing disruption to critical services.
  • Map network topology using CDP, LLDP, and NetFlow data to establish accurate device interconnections and traffic paths across multi-vendor environments.
  • Integrate configuration data from firewalls, switches, and routers into a centralized inventory system to maintain real-time asset visibility.
  • Classify network devices by criticality and exposure level to prioritize monitoring and patching efforts based on business impact.
  • Resolve discrepancies between documented network diagrams and actual configurations discovered through automated tools.
  • Establish baselines for normal network behavior, including bandwidth utilization and connection patterns, to support anomaly detection.

Module 2: Secure Network Architecture Design

  • Implement VLAN segmentation to isolate sensitive systems such as payment processing or HR databases from general user networks.
  • Design and enforce zoning models using firewalls to control east-west traffic between internal segments based on zero-trust principles.
  • Integrate network access control (NAC) systems to enforce device compliance before granting network access, including IoT and contractor devices.
  • Plan high-availability configurations for core network devices, balancing redundancy with attack surface exposure.
  • Define routing policies to prevent route leaks and ensure traffic does not traverse unauthorized paths in multi-site deployments.
  • Select and configure encryption protocols (e.g., IPsec, MACsec) for data in transit across untrusted or shared infrastructure segments.

Module 3: Configuration Management and Change Control

  • Enforce standardized configuration templates across firewall and switch fleets to reduce misconfigurations and ensure consistency.
  • Implement version-controlled repositories for network device configurations to track changes and support rollback during incidents.
  • Integrate change management workflows with ITIL-compliant ticketing systems to audit all configuration modifications.
  • Automate pre-change validation checks to detect policy violations, such as open firewall rules to sensitive subnets.
  • Coordinate maintenance windows for configuration updates to avoid service disruption in globally distributed environments.
  • Conduct post-change verification using automated tools to confirm intended configurations are applied and operational.

Module 4: Monitoring, Logging, and Event Correlation

  • Deploy network-based sensors (e.g., NetFlow collectors, packet brokers) to capture traffic metadata without introducing latency.
  • Normalize and forward logs from heterogeneous network devices to a SIEM using appropriate formats (e.g., Syslog, SNMP traps).
  • Configure thresholds for network anomalies such as broadcast storms, port scans, or unexpected protocol usage.
  • Correlate network events with endpoint and identity data to identify lateral movement or compromised accounts.
  • Suppress alert noise by tuning detection rules based on observed network behavior and known false positives.
  • Maintain log retention periods in compliance with regulatory requirements while managing storage costs and retrieval performance.

Module 5: Firewall and Access Control Management

  • Review and optimize firewall rule sets to eliminate shadowed, redundant, or unused rules that increase complexity and risk.
  • Enforce least-privilege access by restricting firewall rules to specific source/destination IP pairs and required ports.
  • Implement change windows for temporary firewall rule deployments and ensure automatic expiration.
  • Use application-aware filtering on next-generation firewalls to control usage of specific services (e.g., cloud storage, VoIP).
  • Monitor firewall performance metrics to detect rule base bloat or hardware resource exhaustion.
  • Coordinate rule changes across distributed firewalls in active-passive or active-active HA clusters to maintain policy synchronization.

Module 6: Incident Response and Network Containment

  • Isolate compromised network segments using automated VLAN reassignment or firewall blocking rules during active incidents.
  • Preserve network evidence by capturing PCAPs, NetFlow records, and device configurations before remediation actions.
  • Coordinate with security operations to validate indicators of compromise observed in network traffic.
  • Implement dynamic blocking of malicious IPs or domains through integration with threat intelligence platforms.
  • Restore network services after containment by validating device configurations and connectivity before re-enabling access.
  • Document network-specific actions taken during incident response for post-incident review and process improvement.

Module 7: Compliance and Audit Readiness

  • Map network controls to regulatory frameworks such as PCI DSS, HIPAA, or ISO 27001 to demonstrate compliance during audits.
  • Generate reports showing firewall rule inventory, change logs, and access control enforcement for auditor review.
  • Validate segmentation controls through periodic penetration testing or automated verification tools.
  • Ensure network device configurations comply with organization-defined security baselines and CIS benchmarks.
  • Respond to auditor findings by implementing technical fixes or compensating controls with documented risk acceptance.
  • Archive network configuration and log data for the required retention period using tamper-evident storage mechanisms.

Module 8: Automation and Orchestration in Network Security

  • Develop Python scripts or Ansible playbooks to automate repetitive tasks such as VLAN provisioning or firewall rule updates.
  • Integrate network management tools with SOAR platforms to trigger automated responses based on security alerts.
  • Use APIs to synchronize network state across monitoring, ticketing, and configuration management systems.
  • Validate automation workflows in a staging environment before deployment to production networks.
  • Implement role-based access controls for automation tools to prevent unauthorized script execution.
  • Monitor automation job logs for failures or unexpected outcomes and establish alerting for corrective action.
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