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Network Security articles

Segmentation, firewalls, VPNs, DNS, IDS/IPS, and packet analysis

Learn network protocols, segmentation, firewalls, VPNs, NAT, ACLs, IDS/IPS, packet analysis, and secure network architecture for defenders and pentesters.

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Collection snapshot

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Published articles in this collection

Best for: Network engineers, defenders, and pentesters building network visibility

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Published articles

8

Example topics

3

Learning paths

How to use this collection

Read → apply → reference

Each article is written as a practical knowledge block you can use on the job, in labs, or during audits.

1

Learn the concept

Understand the threat, control, or workflow with clear explanations.

2

Follow the checklist

Apply steps, commands, or evidence collection in your environment.

3

Connect to practice

Jump to related labs, tutorials, and tools to reinforce skills.

Example topics in this collection

  • Network segmentation
  • Firewall rules
  • VPN security
  • Packet analysis
  • IDS and IPS
  • DNS security
  • Network monitoring
  • Zero trust networking

Catalog

Articles in network security

Practical guides, checklists, and explainers focused on this security domain.

Outcomes

What you'll learn

  • Design and review firewall rules, segmentation, and remote access controls
  • Investigate DNS, VPN, and routing issues with security impact in mind
  • Tune IDS/IPS and use packet analysis during incident investigation
  • Connect network defense articles to labs and certification study paths

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