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This skill provides a comprehensive guide to implementing microsegmentation policies. It details how to move beyond traditional network boundaries (VLANs) to enforce least-privilege access control between individual workloads using identity and application context. Essential for preventing lateral movement and establishing a robust zero-trust architecture aligned with industry compliance standards.

This guide details the robust process of implementing VLAN-based (802.1Q) network segmentation on managed switches. It is crucial for isolating critical zones—such as DMZ, servers, and IoT—to meet strict compliance standards (PCI-DSS, HIPAA) and significantly limiting the blast radius during a security incident by controlling lateral movement. Includes port hardening and ACL configuration.

A comprehensive guide to configuring pfSense firewalls for robust network security. This skill covers setting up complex network segmentation across multiple zones (DMZ, internal, guest, IoT), implementing granular firewall rules, configuring NAT for port forwarding, and establishing site-to-site or remote-access VPN tunnels using IPsec or OpenVPN. Ideal for network engineers deploying perimeter or internal firewalls.

This comprehensive guide provides a structured, multi-stage workflow for containing active security breaches. It details both short-term and long-term strategies, including network segmentation, endpoint isolation, credential revocation, and evidence preservation. Use this process during confirmed intrusions, ransomware attacks, or lateral movement events to effectively stop adversary activity and secure critical assets before eradication.

This guide teaches how to implement and audit Google Cloud Platform (GCP) VPC firewall rules using gcloud. It covers creating restrictive ingress and egress rules, enforcing network segmentation using tags and service accounts, and auditing for overly permissive settings. Ideal for compliance, zero-trust architectures, and responding to security findings.

This skill guides the implementation of fine-grained network security policies in Kubernetes using Calico CNI. It covers establishing a default-deny baseline, understanding policy ordering, and applying advanced rules like service-account-based selectors. Use it for hardening cluster security, enforcing zero-trust models, and managing network segmentation within containerized environments.

This guide details the deployment of Cisco Identity Services Engine (ISE) for comprehensive Network Access Control (NAC). It utilizes 802.1X authentication, MAC Authentication Bypass (MAB), and posture assessment to enforce security policies. Key features include integrating with Active Directory, assigning dynamic VLANs, and applying TrustSec Security Group Tags (SGTs) for advanced network segmentation in enterprise environments.

This tool analyzes historical network traffic baselines to design secure and functional segmentation architectures for Operational Technology (OT) environments. It helps map flat Purdue-model networks into secure zones (VLANs) and automatically generates required firewall rules based on observed legitimate communication paths, adhering to standards like IEC 62443. Ideal for IT/OT convergence and risk mitigation.

This skill covers the comprehensive design and implementation of network segmentation using layered security controls. It details how to establish isolated security zones (e.g., DMZ, PCI CDE, Management) using VLANs, firewall zones, and granular ACLs. The techniques advance from traditional Layer 2 VLAN separation to modern Layer 7 microsegmentation, enforcing zero-trust principles and meeting strict compliance standards like PCI DSS and HIPAA.

This tool implements robust network segmentation based on the Purdue Enterprise Reference Architecture (PERA) model. It helps designers map and secure Industrial Control Systems (ICS) and SCADA networks into hierarchical security zones (Levels 0-5). It enforces strict data flow control and establishes the critical IT/OT DMZ (Level 3.5), adhering to IEC 62443 standards. Ideal for retrofitting or designing resilient industrial networks.

This guide details implementing Zero Trust Network Access (ZTNA) across major cloud providers (AWS, Azure, GCP). It replaces traditional VPNs by enforcing identity-based, context-aware access controls using identity-aware proxies and micro-segmentation. Use it to secure cloud workloads, limit lateral movement, and comply with modern security standards like BeyondCorp.

This skill simulates advanced Layer 2 network attacks, including VLAN hopping, using techniques like switch spoofing (DTP) and 802.1Q double tagging. It is designed exclusively for authorized penetration testing environments to validate network segmentation, test trunk port hardening, and assess the risk of unauthorized VLAN access across the network infrastructure.