DNS Security
How DNS Records Work and Why They Matter in Cybersecurity
A beginner-friendly guide to A, AAAA, CNAME, MX, TXT, NS, SPF, DKIM, and DMARC records.
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Cybersecurity and IT Notes
Short technical articles documenting what I am learning and building in cybersecurity, networking, Linux, email security, and web security.
Email Security
SPF, DKIM, and DMARC Explained
How email authentication helps reduce spoofing, phishing, and domain abuse risk.
Read Article →Linux Security
Linux Server Hardening Checklist for Beginners
Practical first steps for securing a Linux server with updates, SSH hardening, firewall rules, permissions, and logs.
Read Article →Phishing Analysis
How to Analyze a Suspicious URL Safely
Common phishing indicators, URL red flags, defanging, and safe investigation habits.
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How I Built My Cybersecurity Tools Website
Lessons learned from building browser-based security, DNS, email, network, and analysis tools.
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