VrunSec

I’m Varun Singh, an Information Security practitioner based in Indore with a strong interest in security testing and red teaming. I focus on building deep technical fundamentals through hands-on labs, real-world attack simulations, and continuous self-learning.

This website serves as a public knowledge base documenting my technical notes, certifications, personal handwritten learning material, and security write-ups — created to support beginners as well as fellow security professionals.

• Networking Fundamentals & TCP/IP
• Windows & Linux Operating Systems (Client & Server)
• Web & Infrastructure Security Fundamentals
• Web Application & Network Security Testing
• Reconnaissance & Vulnerability Analysis
• Red Teaming & Adversary Simulation
• Hands-on Labs: Hack The Box & TryHackMe

• Networking Fundamentals
  Networking concepts explained from beginner-friendly to advanced levels, with focus on security testing, protocols, services, and attack surfaces.
  Detailed notes available on request.
• Windows Client Operating System
  Windows client OS fundamentals including system architecture, services, user management, permissions, and security relevance.
  Notes available on request.
• Windows Server Administration
  Windows Server roles, Active Directory fundamentals, and administration concepts relevant to enterprise security testing.
  Notes available on request.
• Linux Operating System
  Linux fundamentals to advanced concepts including command-line usage, file systems, permissions, processes, and system internals.
  🔗 github.com/Varun-Singh1/Linux-notes
• Linux Server Administration
  Linux server setup, services, configuration, and administration with emphasis on security implications and misconfigurations.
  🔗 github.com/Varun-Singh1/Linux-Server
• Website Development & WordPress Hosting
  Manual website hosting, WordPress setup, deployment, and security hardening, focused on real-world hosting environments and vulnerabilities.
  Personal handwritten notes available on request.
• Web Application Security Testing
  Practical learning in OWASP Top 10 vulnerabilities, testing methodology, and exploitation techniques.
  🔗 github.com/Varun-Singh1/Webpentest
• Network Security Testing
  Network reconnaissance, enumeration, attacks, and exploitation techniques used during security assessments.
  🔗 github.com/Varun-Singh1/Network-Pentesting

• ISC2 Candidate Program (Batch Participant)
  Selected participant in the ISC2 candidate program focused on cybersecurity fundamentals, networking concepts, access control, risk management, and security principles.
  View Credly Badge
• TryHackMe – Advent of Cyber (Completion Certificate)
  Hands-on security challenges covering web, cloud, malware, and defensive concepts · Verify Certificate
• Armour Infosec Certified Linux Server Administrator (AICLSA)
  Issued: July 1, 2025 · Verify Certificate
• Armour Infosec Certified WordPress Security Expert (AICWSE)
  Issued: June 25, 2025 · Verify Certificate
• Armour Infosec Certified Windows Server Administrator (AICWSA)
  Issued: December 2, 2024 · Verify Certificate

• Email: vruncybersec@gmail.com
• GitHub: github.com/Varun-Singh1
• LinkedIn: linkedin.com/in/varun-singh-chauhan