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Network Security in IT Operations Management

Network Security in IT Operations 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 governance of network security controls across on-premises and cloud environments, comparable to a multi-phase security hardening initiative seen in medium-to-large enterprises modernizing their IT operations.

Module 1: Security Architecture and Network Design

  • Selecting between flat and segmented network topologies based on organizational risk tolerance and compliance requirements.
  • Implementing VLANs and subnet isolation to restrict lateral movement in the event of a breach.
  • Designing DMZs for public-facing services while enforcing strict ingress and egress filtering.
  • Evaluating the placement of security controls (e.g., firewalls, IDS) at network chokepoints.
  • Integrating Zero Trust principles into network segmentation policies for hybrid environments.
  • Documenting network architecture diagrams with security zones, trust boundaries, and data flows for audit readiness.

Module 2: Firewall and Access Control Management

  • Creating and maintaining firewall rule sets with least-privilege access and regular rulebase hygiene.
  • Transitioning from implicit allow to explicit deny default policies across enterprise firewalls.
  • Implementing application-aware filtering on next-generation firewalls to control SaaS usage.
  • Coordinating firewall change management with change advisory boards to minimize downtime.
  • Standardizing firewall logging formats to enable centralized log correlation and analysis.
  • Enforcing consistent access control policies across cloud and on-premises environments.

Module 3: Intrusion Detection and Prevention Systems

  • Deploying network-based IDS/IPS sensors at critical network segments based on traffic volume and sensitivity.
  • Tuning signature-based detection rules to reduce false positives in high-volume environments.
  • Configuring passive monitoring vs. active blocking modes based on operational risk appetite.
  • Integrating IDS alerts with SIEM platforms for correlation with other security events.
  • Conducting regular rule updates and vulnerability-based signature deployment after patch cycles.
  • Performing periodic traffic baselining to identify anomalous patterns indicative of compromise.

Module 4: Secure Remote Access and VPN Management

  • Selecting between IPsec and SSL/TLS VPNs based on endpoint control and application access needs.
  • Enforcing multi-factor authentication for all remote access sessions, including vendor connections.
  • Implementing split tunneling policies that balance performance and security exposure.
  • Rotating and revoking VPN certificates and pre-shared keys on a defined lifecycle schedule.
  • Monitoring concurrent user sessions and geolocation anomalies for potential credential misuse.
  • Architecting redundant VPN gateways to maintain availability during failover events.

Module 5: Endpoint Security Integration with Network Controls

  • Enforcing NAC policies that require up-to-date antivirus and OS patches before network access.
  • Integrating EDR telemetry with network firewalls to dynamically quarantine compromised hosts.
  • Configuring host-based firewalls to complement network-level filtering policies.
  • Implementing device posture assessment for BYOD and contractor devices connecting to corporate resources.
  • Coordinating endpoint encryption status with network access permissions for data protection.
  • Using 802.1X authentication with RADIUS to tie user identity to network activity logs.

Module 6: Logging, Monitoring, and Incident Response

  • Configuring NetFlow and packet capture retention policies in alignment with legal requirements.
  • Establishing thresholds for network-based alerts that trigger incident response workflows.
  • Correlating firewall denies, IDS alerts, and authentication logs to identify coordinated attacks.
  • Designing packet capture deployment strategies that balance forensic utility and storage costs.
  • Conducting tabletop exercises using real network logs to validate detection and response playbooks.
  • Integrating network security events into SOAR platforms for automated enrichment and response.

Module 7: Cloud and Hybrid Network Security

  • Mapping traditional network security zones to cloud VPCs and virtual network interfaces.
  • Configuring cloud-native firewalls (e.g., AWS Security Groups, Azure NSGs) with least privilege.
  • Implementing secure transit between on-premises and cloud environments using encrypted tunnels.
  • Enforcing consistent DNS filtering and threat intelligence feeds across cloud workloads.
  • Monitoring east-west traffic in cloud environments for anomalous inter-instance communication.
  • Managing shared responsibility for network security in IaaS vs. SaaS deployment models.

Module 8: Governance, Compliance, and Risk Management

  • Aligning firewall and segmentation policies with regulatory frameworks such as PCI DSS and HIPAA.
  • Conducting regular firewall rule audits to identify and remove orphaned or overly permissive rules.
  • Documenting network security exceptions with risk acceptance sign-offs from business owners.
  • Performing network penetration testing to validate control effectiveness annually or after major changes.
  • Establishing metrics for firewall change success rates, incident response times, and alert volumes.
  • Integrating network security controls into enterprise risk assessments and board-level reporting.
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