Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
Networking · modules
OSI layers, TCP/IP, subnetting, packet analysis — the foundation of every security skill.
MPLS, SD-WAN, and the Indian Enterprise WAN
MPLS is the legacy carrier-grade WAN — expensive, predictable, low-jitter, with operator-managed L3 VPNs. SD-WAN overlays multiple cheaper transports (broadband, LTE, 5G, MPLS) with software-defined policy, dynamic path selection, and integrated security. The Indian enterprise WA
Zero Trust Network Access vs Traditional VPN — The Replacement Pattern That Is Now Default
Traditional VPN puts users on the corporate network — once authenticated, broad reachability. ZTNA does the opposite — explicit per-application authorisation, no network-level access, continuous verification. ZTNA is the modern remote-access pattern; VPN remains for site-to-site.
CDN and DDoS Defence — Cloudflare, Akamai, Anti-Bot in 2026
A CDN serves your content from edge nodes near users — fast, reliable, and incidentally an extraordinary DDoS shield. This module covers what a CDN actually does (caching, anycast, TLS termination), how DDoS attacks have evolved (volumetric, protocol, application, bot-driven), an
Network Telemetry — NetFlow, sFlow, IPFIX, and What a SOC Actually Watches
Network telemetry is the per-flow metadata your routers and switches export — who talked to whom, when, how much, on what ports. NetFlow (Cisco), sFlow (broadcom/multivendor), IPFIX (the IETF standard) are the three protocols you will meet. PCAP captures everything; telemetry cap
Load Balancers, Reverse Proxies, and the L7 Stack
A load balancer distributes traffic across backend servers. A reverse proxy sits in front of backend servers, terminating client connections, often inspecting and rewriting traffic. In modern architectures, the line is blurred: nginx, HAProxy, Envoy, AWS ALB, Cloudflare all do bo
Wireless Security and Wi-Fi Attacks — WEP to WPA3, and Why Captive Portals Lie
Wi-Fi has gone through five generations of security: WEP (broken, do not deploy), WPA/WPA2 (still common, still attackable via offline cracking and KRACK), WPA3 (the modern default with SAE replacing PSK), and 802.1X / WPA3-Enterprise for managed environments. This module covers
BGP Security and RPKI — How the Internet Trusts Itself, and Why It Sometimes Should Not
BGP is the routing protocol of the Internet — every ISP, hyperscaler, and large enterprise speaks it. It assumes good behaviour by every participant; that assumption fails several times a year, and we get prefix hijacks, route leaks, and accidental outages. RPKI cryptographically
IPv6 Security — Why You Already Have IPv6 Even If You Did Not Notice
IPv6 is on by default in every modern operating system. If you only configured IPv4 ACLs, half your network is unprotected. This module covers IPv6 addressing (link-local, ULA, GUA), Stateless Address Auto-Configuration (SLAAC), Neighbor Discovery (the ARP replacement and its att
VPN Fundamentals — IPsec, OpenVPN, WireGuard and the Math That Makes Them Work
A VPN tunnels Layer 3 (or Layer 2) traffic over an untrusted network, with confidentiality, integrity, and authentication. The three protocols you need to know are IPsec (the enterprise default), OpenVPN (the legacy SSL VPN), and WireGuard (the modern lightweight default). This m
Firewall and ACL Design — Stateless, Stateful, NGFW, and the Rules That Survive 5 Years
A firewall is just a structured list of "allow / deny" rules applied to traffic. Stateless ACLs filter packet by packet; stateful firewalls track connections; NGFWs add Layer 7 inspection. The trick to firewall design is not picking the product — it is designing rules that are ex
Practitioners who've
shipped the controls.
Every module is written by someone who has built the defence or run the engagement. No repackaged tutorials, no generic theory.
Why learn here
Practitioner-written.
Each lesson is authored by someone who has shipped the control or run the engagement in production.
Quiz after every module.
20+ questions with explanations. 70%+ to mark complete. Unlimited retries.
Progress tracked.
Completions, scores and streaks saved automatically. Resume exactly where you left off.
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Start free. ₹499/mo for intermediate. ₹4,999/yr for advanced. No hidden fees, ever.