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Network Security in Security Management

Network Security in Security Management

$249.00
Toolkit Included:
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 design, implementation, and operational management of network security controls across hybrid and cloud environments, reflecting the multi-phase effort of an enterprise-wide security transformation typically addressed through coordinated workshops, architecture reviews, and cross-functional team engagements.

Module 1: Security Policy Development and Governance

  • Define scope and enforcement boundaries for acceptable use policies across hybrid work environments with BYOD and corporate-owned devices.
  • Establish data classification tiers and map them to network access controls, ensuring alignment with regulatory requirements such as GDPR or HIPAA.
  • Implement role-based access control (RBAC) frameworks that integrate with existing identity providers and support least-privilege principles.
  • Negotiate policy exceptions for business-critical systems while maintaining audit trails and compensating controls.
  • Conduct periodic policy reviews with legal, compliance, and business unit stakeholders to address evolving threats and operational changes.
  • Deploy automated policy compliance monitoring using SIEM rules to detect deviations from defined network usage standards.

Module 2: Network Architecture and Segmentation

  • Design zero-trust network segments for critical assets, replacing flat network topologies with micro-segmentation strategies.
  • Evaluate placement and configuration of firewalls, routers, and switches to enforce layer 3 and layer 4 access controls between zones.
  • Implement VLAN strategies that isolate guest, IoT, and corporate traffic while managing inter-VLAN routing securely.
  • Integrate software-defined perimeter (SDP) components to dynamically control access based on device posture and user identity.
  • Balance performance and security by determining optimal placement of inline security appliances without creating network bottlenecks.
  • Document network topology changes and update data flow diagrams to reflect real-time segmentation policies and trust boundaries.

Module 3: Firewall and Access Control Management

  • Create and maintain firewall rule sets with explicit deny-by-default policies and regularly audit for orphaned or overly permissive rules.
  • Standardize rule naming and change request workflows to ensure traceability and support incident investigation.
  • Configure stateful inspection rules to allow necessary protocols while blocking high-risk services such as SMBv1 or Telnet.
  • Deploy next-generation firewall (NGFW) application control features to restrict unauthorized SaaS and peer-to-peer traffic.
  • Coordinate firewall change windows with operations teams to minimize service disruption during rule updates or firmware upgrades.
  • Implement centralized firewall log collection and correlation to detect policy violations and reconnaissance attempts.

Module 4: Intrusion Detection and Prevention Systems

  • Select IDS/IPS deployment mode (inline vs. passive) based on risk tolerance, network criticality, and false positive impact.
  • Tune signature-based detection rules to reduce false positives while maintaining coverage for known exploit patterns.
  • Configure anomaly-based detection thresholds using baseline traffic patterns from netflow and packet capture data.
  • Integrate IDS alerts with SOAR platforms to automate containment actions such as blocking malicious IPs at the firewall.
  • Conduct red team exercises to validate IDS/IPS efficacy in detecting lateral movement and encrypted tunneling techniques.
  • Manage signature update schedules and test new rule sets in staging environments before production deployment.

Module 5: Secure Remote Access and VPN Strategies

  • Compare IPsec vs. SSL/TLS VPN architectures for different user groups, weighing client requirements and endpoint security control.
  • Enforce multi-factor authentication (MFA) for all remote access sessions, including integration with enterprise identity providers.
  • Implement split tunneling policies that allow local internet breakout while protecting access to internal resources.
  • Monitor and log all remote access sessions for duration, data volume, and accessed systems to support forensic investigations.
  • Rotate and manage VPN certificates and pre-shared keys according to cryptographic lifecycle policies.
  • Design failover and redundancy for remote access gateways to maintain availability during denial-of-service events.

Module 6: Network Monitoring and Traffic Analysis

  • Deploy network taps or port mirroring to capture traffic for full packet analysis without introducing latency.
  • Use NetFlow and IPFIX data to establish baseline communication patterns and detect anomalous peer connections.
  • Configure packet capture tools (e.g., tcpdump, Wireshark) for targeted investigations of suspected command-and-control traffic.
  • Integrate network metadata with SIEM systems to correlate events across endpoints, servers, and cloud services.
  • Define retention policies for packet captures and flow logs based on storage capacity and legal requirements.
  • Respond to encrypted traffic analysis challenges by deploying TLS decryption proxies with proper key management and privacy controls.

Module 7: Incident Response and Network Forensics

  • Preserve network device configurations and logs during an incident to maintain chain of custody for forensic use.
  • Isolate compromised network segments using dynamic ACLs or SDN controls while minimizing business impact.
  • Reconstruct attack timelines using firewall logs, DNS queries, and proxy records to identify initial access vectors.
  • Coordinate with ISPs and cloud providers to obtain external logs relevant to distributed attacks or data exfiltration.
  • Conduct post-incident network traffic reviews to identify missed detection opportunities and update monitoring rules.
  • Document network-based indicators of compromise (IOCs) and share them with threat intelligence platforms for proactive blocking.

Module 8: Cloud and Hybrid Network Security

  • Configure cloud security groups and network ACLs to mirror on-premises segmentation policies in IaaS environments.
  • Implement secure connectivity between on-premises data centers and cloud VPCs using encrypted transit (e.g., AWS Direct Connect with MACsec).
  • Enforce consistent DNS security policies across cloud and on-premises networks using split-horizon DNS or cloud-native DNS filtering.
  • Monitor east-west traffic in cloud environments using virtual firewalls or native flow logging (e.g., AWS VPC Flow Logs).
  • Integrate cloud network security controls with on-premises security orchestration tools for unified policy management.
  • Address shadow IT by deploying network-based discovery tools to detect unauthorized cloud service usage via egress traffic analysis.
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