Cybersecurity and Ethical Hacking Tutorials

DNS reconnaissance is a technique to gather information about DNS (Domain Name System) data. This process helps in identifying the network infrastructure and

Common active reconnaissance methods include the following:

Learn what a URL fuzzer does, how web application fuzzing works, when to use online URL fuzzers vs command-line tools, and how to choose between FFUF, Gobuster, Dirsearch, Wfuzz, Feroxbuster, and Burp Intruder for …

Learn practical and authorized ways to find hidden API endpoints using browser DevTools, JavaScript files, GitHub search, archived URLs, gau/getallurls, APK analysis, and JS recon tools such as LinkFinder and JSFScan.

Free, hands-on ethical hacking and penetration testing tutorial - lab setup, reconnaissance, password cracking, phishing, web/mobile pentesting, MITM attacks, and exploitation frameworks. 80+ practical lessons.

Complete OpenSSL and PKI tutorial - generate keys, build a Certificate Authority, issue SAN and ECC certificates, configure mTLS, renew and revoke certificates. 24 hands-on lessons tested on Linux.

Free, hands-on Wireshark tutorial covering capture, filters, decryption, TCP/UDP analysis, TLS/IPsec inspection, and real-world troubleshooting. 35+ packet-level examples with sample .pcap files included.

Learn how to install .deb files in Kali Linux using dpkg, apt, and gdebi. Step- by-step commands, dependency fixes, and best practices.

How to export the variable "http_proxy" or "https_proxy" when there are special characters in username or password in Linux?

In this tutorial we will be setting up the Lab Environment which we will use through out the course of CompTIA PenTest+ Tutorial.

With mutual TLS authentication (MTLS), not only does the service side prove its identity by exposing a certificate, but also the clients prove their identity to the servers by exposing a client-side certificate.

Elliptic Curve Cryptography (ECC) is an encryption technique that provides public-key encryption similar to RSA. We can generate ECC certificates using openssl and install it on Apache server for verification

Cervantes is an open source, a collaborative platform designed for pen-testers and red teams looking to save time and manage their projects, clients,

Steps to create root and intermediate CA certificate and combine them to openssl create certificate chain. Openssl verify certificate chain (CA bundle)

Step by step instruction to generate Certificate Signing Request (CSR) for Subject Alternative Name (SAN) certificates using openssl with examples in Linux

Since you are here so I can only assume you are also interested in becoming cybersecurity penetration tester, also called an Ethical Hacker. This tutorial is

People say they know what SQL injection is, but all they have heard about or experienced are trivial examples. SQL injection is one of the most devastating

Understanding overview on PKI, Certificate Authority, Certificate Revocation Lists, Online Certificate Status Protocol, Certification Authorities & Hierarchies

Steps with openssl create self signed certificate Linux with and without passphrase. Use self signed certificate with Apache webserver example

Step by step instructions to revoke or delete certificate from keystone and generate CRL Certificate Revocation List) using openssl in Linux with example openssl generate crl.

Create SAN certificate using openssl generate csr with san command line. Openssl sign CSR with Subject Alternative Name. openssl add san to existing certificate

Steps to create client certificate and server certificate using your own Certificate Authority chain (CA bundle) and configure Apache with SSL (HTTPS)

Learn how to generate a ca certificate and how to sign a certificate using openssl. Steps to create certificate authority CA and CSR with openssl

Steps to generate csr (certificate signing request) using openssl in Linux with examples. Create private key with and without passphrase.

Use openssl to view certificate content for different kinds of certificate. how to read x509 certificate. view certificate details

Technically you can't renew expired root CA certificate instead you can create a new root ca certificate using private key with openssl. The new root CA certificate can be used to verify old certificates.

Step by Step instructions to renew SSL or TLS certificate (server/client) using OpenSSL command. Retain all SAN fields with X.509 extensions during renewal of certificate.

Step by Step instructions to renew self-signed certificate using OpenSSL command. Export CSR using expired certificate and using existing private key we can renew any kind of certificate

Step by Step instructions to use shell script to generate certificates with openssl. generate both self signed and rootCA signed certificates using bash or shell script without any prompt.

We must consider some important point when creating CSR or else we may face issues later while using the certificate