Networking
Ethernet Explained: The Complete Guide to How Ethernet Works
Learn how Ethernet works from the physical layer to Ethernet frames, MAC addresses, switches, VLANs, ARP, STP, MTU, MSS, Wireshark and modern networks
DNS Explained: How the Domain Name System Works from Root Servers to DNSSEC
Learn how the Domain Name System (DNS) works, from domain names and recursive resolution to DNS records, packet analysis, DNSSEC, DoH etc.
Address Resolution Protocol (ARP): How IPv4 Devices Discover Each Other on an Ethernet Network
Learn everything about the Address Resolution Protocol (ARP), including how ARP works, ARP cache, ARP requests and replies, Gratuitous ARP etc.
Bluetooth Security Guide: Architecture, Protocol Stack & BlueBorne
Master Bluetooth security with an in-depth guide covering Bluetooth Classic, BLE, protocol stack, pairing, Linux tools, vulnerabilities, BlueBorne etc.
Wi-Fi Networks (802.11): The Complete Guide for Penetration Testers
Complete 802.11 pentesting guide: WPA2 handshake capture, PMKID attacks, WPS cracking, and Evil Twin setup with aircrack-ng commands
iptables Explained: The Complete Linux Firewall Guide (2026)
Learn iptables from the ground up: tables, chains, rules, persistence, and the misconfigurations attackers actually look for. Full 2026 guide
Network Analysis: The Complete Guide to CLI Tools, Packet Sniffers, tcpdump, and Wireshark
Deep technical guide to network analysis: CLI tools, tcpdump BPF syntax, Wireshark filters, promiscuous mode, pcap vs pcapng, tshark, and practical exercises
Subnetting and CIDR Notation: The Complete Technical Guide
A deep-dive technical guide to subnetting and CIDR notation. Subnet masks, binary math, VLSM, route aggregation, and practical IP design in detail
Networking Basics: The Complete Beginner’s Guide to IP Addresses, Ports, TCP/IP, NAT, DHCP, the OSI Model, and Network Topologies
IP addresses, ports, TCP/IP, NAT, DHCP, and the OSI model explained simply with diagrams, real commands, and security context
VPN Encryption Is Not Enough: How DPI, TLS Fingerprinting, and Active Probing Expose Your Traffic
Your VPN encrypts the payload but not the shape of your traffic. Here's exactly how DPI, JA3/4 TLS fingerprinting, and active probing expose VPN
