Skills › Cybersecurity

Network Security

Secure networks — firewalls, IDS/IPS, VPNs, and zero-trust architecture.

intermediate 🔐 Cybersecurity
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After this skill you can…

  • Configure a firewall with proper inbound/outbound rules
  • Detect intrusions with Snort or Suricata
  • Design a zero-trust network architecture

Prerequisites

Watch (10 videos)

GNS3 Labs: DMVPN, IPsec and NAT across BGP Internet routers: Answers Part 7
David Bombal · beginner hands-on
→ Configure DMVPN→ Implement IPsec→ Set up NAT across BGP routers
HackTheBox - Intentions
IppSec · beginner hands-on
→ Conduct penetration testing→ Identify vulnerabilities in web applications
HackTheBox - Trickster
IppSec · beginner hands-on
→ Perform nmap scans→ Bypass WAFs→ Exploit known vulnerabilities
HackTheBox - MonitorsFour
IppSec · beginner hands-on
→ Conduct nmap scans→ Perform enumeration→ Exploit vulnerabilities
Live Hacking - Twitch Recording overthewire.org - Vortex 0x01-0x03 (3h)
LiveOverflow · intermediate hands-on
→ Identify network vulnerabilities→ Conduct pen testing
Capture and Replay Phone Calls with Kali Linux and Wireshark (MITM / VoIP replay)
David Bombal · intermediate hands-on
→ Capture VoIP phone calls→ Replay RTP packets
GNS3 Labs: Dynamic IPsec VPNs and NAT across BGP Internet routers: Answers Part 3
David Bombal · beginner hands-on
→ Configure dynamic IPsec VPNs→ Configure NAT across BGP Internet routers
[Demo] Network Security Integration with Palo Alto
Google Cloud Tech · beginner hands-on
→ Deploy Network Security Integration→ Configure next generation firewall policies→ Integrate third party network virtual appliances
Network security fundamentals: Creating layered network defenses with built-in tools
Google Cloud · beginner hands-on
→ Create layered network defenses→ Configure firewall rules
HackTheBox - MetaTwo
IppSec · beginner hands-on
→ Conduct a network scan with nmap→ Exploit a vulnerability with SQLMap

Read (10 articles)

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Deauthentication Attack using Kali Linux
Dev.to · Thanos Stantzouris · 2023-11-20
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Scanning ports and finding network vulnerabilities using nmap
Dev.to · Grzegorz Piechnik · 2023-12-01
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SYN Flood Attack
Dev.to · Grzegorz Piechnik · 2023-12-03
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ARP Request & Replay Attack: How Hackers Hijack Networks
Dev.to · S3CloudHub · 2024-10-18
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These 12 DDoS Attacks Shook the Internet to Its Core
Dev.to · Nube Colectiva · 2025-07-06
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Firezone vs NetBird: Zero-Trust VPN Compared
Dev.to · selfhosting.sh · 2026-02-20
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CVE-2026-2329: Grandstream VoIP RCE Attack Chain Analysis
Dev.to · Satyam Rastogi · 2026-02-23