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Network Security

Covers strategies, tools, and best practices for protecting computer networks from unauthorized access, cyberattacks, and data breaches. Topics include firewalls, intrusion detection systems, network segmentation, and monitoring techniques that help organizations maintain secure and resilient infrastructure.

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Spoofing

Spoofing Attacks: How They Work and How to Stop Them

A CFO Wired $25 Million Because of a Spoofed Video Call In early 2024, a finance worker at a multinational firm in Hong Kong transferred $25.6 million after joining a video conference call where every other participant — including the company's CFO — was a deepfake. The threat actors

Carl B. Johnson Jan 17, 2026 7 min read
Zero Trust Security Model

Zero Trust Security Model: Why Perimeter Defense Is Dead

In January 2024, Microsoft disclosed that the Russian threat actor Midnight Blizzard had breached corporate email accounts — not by exploiting some exotic zero-day, but by password spraying a legacy test tenant that lacked multi-factor authentication. One overlooked account. No MFA. Catastrophic access. If a company with Microsoft's resources

Carl B. Johnson Jun 12, 2025 7 min read
Zero Trust

What Is Zero Trust? A Practical Guide for 2025

The Breach That Made "Trust But Verify" Obsolete In January 2024, Microsoft disclosed that a Russian state-sponsored threat actor known as Midnight Blizzard had compromised executive email accounts — not by exploiting some exotic zero-day, but by password-spraying a legacy test tenant account that lacked multi-factor authentication. One overlooked

Carl B. Johnson Jun 12, 2025 8 min read
Zero Trust Network Access

Zero Trust Network Access: A Practical 2025 Guide

The VPN That Let Attackers Walk Right In In January 2024, the Cybersecurity and Infrastructure Security Agency (CISA) confirmed that Chinese state-sponsored threat actors had exploited Ivanti Connect Secure VPN vulnerabilities to breach multiple U.S. federal agencies. The attackers didn't kick down the door. They walked through

Carl B. Johnson May 25, 2025 7 min read
Zero Trust Implementation

Zero Trust Implementation: A Practical Guide for 2025

In January 2024, Microsoft disclosed that a Russian threat actor known as Midnight Blizzard breached corporate email accounts — not through some exotic zero-day, but by password-spraying a legacy test account that lacked multi-factor authentication. One forgotten account. No segmentation. No least-privilege enforcement. The result: a nation-state actor reading executive emails

Carl B. Johnson May 25, 2025 7 min read
VPN Best Practices

VPN Best Practices: 9 Rules That Actually Stop Breaches

In May 2024, Check Point disclosed that threat actors were actively exploiting a zero-day vulnerability in its VPN products — CVE-2024-24919 — to harvest Active Directory credentials and move laterally through enterprise networks. Attackers didn't need a sophisticated exploit chain. They needed one VPN gateway running a default configuration with

Carl B. Johnson May 25, 2025 7 min read
Remote Desktop Security Risks

Remote Desktop Security Risks: What Attackers See

Port 3389: The Door You Left Wide Open In January 2024, the FBI and CISA issued a joint advisory warning that the Phobos ransomware group had been exploiting exposed Remote Desktop Protocol (RDP) services to breach organizations across government, healthcare, education, and critical infrastructure. The attackers didn't use

Carl B. Johnson May 18, 2025 8 min read
Man in the Middle Attack

Man in the Middle Attack: How Hackers Steal Data

In January 2024, security researchers at Sekoia documented a massive adversary-in-the-middle campaign that used phishing kits to intercept Microsoft 365 credentials and session tokens in real time — bypassing multi-factor authentication entirely. The attack wasn't theoretical. It hit thousands of organizations across multiple industries. And it reminded every security

Carl B. Johnson Dec 19, 2024 8 min read
DNS Spoofing Attack

DNS Spoofing Attack: How It Works and How to Stop It

In April 2024, security researchers at Akamai reported a massive DNS hijacking campaign targeting over 600 domains, redirecting users to credential harvesting pages that looked identical to legitimate banking and email portals. Victims had no idea they were on a fake site. Their browsers showed no warnings. The URLs looked

Carl B. Johnson Dec 19, 2024 8 min read
Ransomware

How Ransomware Spreads: 7 Paths Into Your Network

In September 2023, MGM Resorts lost an estimated $100 million after a social engineering phone call — just one phone call — gave threat actors the foothold they needed to deploy ransomware across the company's entire infrastructure. Slot machines went dark. Hotel key cards stopped working. Reservation systems collapsed. All

Carl B. Johnson Feb 09, 2024 7 min read