Articles & Guides
Useful resources for web developers and system administrators
SEO
Schema.org Structured Data: How to Check and Implement It — JSON-LD, Types, Validators
What Schema.org structured data is and how to implement it: JSON-LD vs microdata vs RDFa, core types, ready-to-use code examples. How to check structured data online with Google, Yandex and schema.org validators, common errors and an implementation checklist.
SEO
Open Graph Tags: How to Control Link Previews in Telegram, X and Social Networks
Open Graph setup guide: the five core og tags, og:image size 1200×630, Twitter Card summary_large_image, fixing empty or stale link previews, forcing a cache refresh in Telegram and X, and validating the card with a preview tool.
Infrastructure
Email on Your Own Domain: Setup, Website Sending and Migration Without Losing Mail
How to set up email on your own domain: domain verification, MX, SPF, DKIM and DMARC, sending website mail over SMTP, and migrating providers without losing messages.
SEO
Why Your Website Doesn't Show Up in Search: Indexing Checklist
Site missing from Google? Learn how to check indexing with the site: operator and Search Console, find blockers — robots.txt Disallow, noindex, server errors, downtime — and get your pages back into search results, step by step.
Security
Website and IP Blacklist Check: Find Every List and Get Delisted
Website or IP blacklisted? Check Safe Browsing, SmartScreen, email DNSBLs and AbuseIPDB: dig commands, 127.0.0.x return codes and the delisting order.
Security
Website Privacy Policy: What It Must Contain and How to Publish It
Website privacy policy: who needs one, which sections it must contain, how to publish it, how to run a compliant cookie consent banner under GDPR and ePrivacy, and what fines you risk without one.
Infrastructure
How to Choose Web Hosting: Criteria, Pre-Purchase Checks, Red Flags
How to choose web hosting: shared vs VPS vs dedicated vs cloud, hidden shared-plan limits (inodes, CPU seconds), backup and SLA math in real downtime minutes, measuring TTFB before you pay, contract red flags, and a 12-point vendor-neutral checklist.
Security
Website Security Check: The Complete Checklist
Website security check: the complete checklist. How to test any website online in 5 minutes — HTTPS, security headers, CSP, cookies, malware — plus a full owner's checklist with curl examples and a layer-by-layer summary table.
Security
Website Hacked: What to Do in the First Hour
Website hacked — what to do in the first hour: a minute-by-minute plan. Isolate the site, rotate all credentials, preserve logs, find the web shell and entry point, restore from a clean backup, and close the vulnerability. With commands, a 10-step checklist, and FAQ.
Networking
How to Check Ping: Internet, Server, and Website
How to check ping to a server, website, or your internet connection: the ping command on Windows, macOS, and Linux, online ping from another network location, a table of normal ping values, and a diagnostics checklist for high or unstable ping.