Articles & Guides
Useful resources for web developers and system administrators
Monitoring
How to Check If a Website Is Down: Availability and "Is It Just Me?"
Tell whether a site is down for everyone or just you: check from outside, HTTP status, another device and network. What the result means and what to do.
Tools
How to Find Out What CMS (Engine) a Website Runs On
Which traces reveal a site’s CMS: the generator meta, /wp-content/ paths, headers, and cookies. An auto-detector and why the engine is sometimes hidden.
Infrastructure
How to Check If an Email Address Exists
Three levels of email verification: syntax, MX records, SMTP probe — and why a 100% check without sending is impossible. How to verify safely.
Domains
How to Check If a Domain Is Available: Name Availability in a Minute
Find out in a minute whether a domain is free or taken: WHOIS lookup, reading the answer, checking several zones, and what to do if the name is taken.
Domains
How to Find Out a Website's Hosting and IP Address
Find a site’s IP and hosting in a minute: the domain → A record → IP → ASN → network owner chain. Why a CDN shows only the proxy, not the real server.
Security
How to Check a Website for Fraud: 12 Signs of a Phishing Site
12 technical and behavioral signs of a fraudulent site: domain age, address spoofing, SSL details, legal info. A two-minute check with free browser tools.
Security
DDoS Attack on Your Website: How to Tell You're Under Attack and What to Do in the First Hour
Signs of a DDoS attack, a first-hour action plan, how to tell an attack from an outage, and how to prepare in advance. Log triage, anti-DDoS, rate limiting.
Security
Threat Intelligence (TI): What Cyber Threat Intel Is
Threat Intelligence (TI) explained: strategic, tactical, operational and technical types, IOC/TTP/OSINT sources, MITRE ATT&CK, TIP platforms and hunting.
Security
SOC (Security Operations Center): What It Is & How It Works
SOC (Security Operations Center) explained: what it does, L1/L2/L3 roles, SOC vs NOC, in-house vs SOCaaS/MSSP, SIEM/SOAR/EDR tooling, and how to build one.
Security
SIEM: What It Is, How It Works, vs SOAR and XDR
What SIEM (Security Information and Event Management) is: how it works, SIEM vs SOAR and EDR/XDR, correlation rules, MITRE ATT&CK use-cases, limits.