Required Nginx settings for WordPress

Accelerating WordPress at the Nginx level: correct PHP-FPM settings, try_files, static files, caching, Brotli, wp-login protection, and secure headers for stable website performance under load.

https://3v-host.com/blog/required-nginx-settings-for-wordpress/

How do IP addresses work?

Learn how IP addresses work: IPv4 vs IPv6, public and private IPs, DNS resolution, routing, security basics, and how IPs are used in real server and cloud infrastructure.

https://3v-host.com/blog/how-do-ip-addresses-work/

The Grep command in Linux: a beginner's guide

A practical introduction to grep for Linux: how the command works, which flags you really need, common mistakes, and real-world scenarios for using grep in administration, development, and DevOps.

https://3v-host.com/blog/grep-command-in-linux/

Off-page SEO checklist for improving website ranking

Off-page SEO without myths: links, brand mentions, reputation, and behavioral factors. A practical checklist for evaluating external signals and increasing website trust.

https://3v-host.com/blog/off-page-seo-checklist-for-improving-website-ranking/

What is GitOps?

GitOps is an approach to managing infrastructure and Kubernetes through Git as a single source of truth. It simplifies deployment, reduces risks, eliminates configuration drift, and increases control over changes.

https://3v-host.com/blog/what-is-gitops/

Optimizing Windows Server 2022 memory consumption on VPS with limited RAM

Optimizing Windows Server 2022 on a VPS with 2-4 GB of RAM: how the system uses memory, what can be safely configured, pagefile, services, GUI, and when upgrading RAM is more reasonable than tweaking.

https://3v-host.com/blog/optimizing-windows-server-2022-memory-consumption-on-vps/

How to manage ports on a VPS or dedicated server

Managing ports on VPS and dedicated servers: how to check open ports, configure your firewall correctly, avoid common mistakes, and improve infrastructure security.

https://3v-host.com/blog/how-to-manage-ports-on-a-vps-or-dedicated-server/

How to Switch User in Ubuntu

Switching users in Ubuntu: su, sudo, sudo -i, sudo -u, and SSH. A practical guide to working securely with permissions, environments, and sessions on servers and desktops.

https://3v-host.com/blog/how-to-switch-user-in-ubuntu/

What is a favicon?

Favicon - what it is, why you need it, and how to set it up correctly for all browsers and devices. Sizes, formats, SEO impact, and common mistakes in one guide.

https://3v-host.com/blog/what-is-a-favicon/

What is WHOIS?

What is WHOIS and how to use it: domain, IP, and ASN verification, status, delegation, GDPR, differences from RDAP, and practical scenarios for administrators and businesses.

https://3v-host.com/blog/what-is-whois/

ERR_NAME_NOT_RESOLVED: what this error means and how to fix it

ERR_NAME_NOT_RESOLVED error: what it means, why it occurs, and how to quickly fix it. Detailed DNS diagnostics, dig, NS, TTL, propagation, and practical solutions for production.

https://3v-host.com/blog/err-name-not-resolved-what-this-error-means/

How to choose a VPS for a Telegram bot

How to choose a VPS for a Telegram bot: CPU, RAM, and disk requirements, webhook or polling, security, monitoring, and scaling without unnecessary costs.

https://3v-host.com/blog/how-to-choose-a-vps-for-a-telegram-bot/

What is highly available infrastructure and why is it needed?

What is High Availability infrastructure? Principles of fault-tolerant architecture, elimination of SPOF, failover, data replication, and monitoring. How to build a stable and reliable service.

https://3v-host.com/blog/what-is-highly-available-infrastructure/

Setting up WireGuard on a VPS

Step-by-step guide to setting up WireGuard on a VPS: installation, key generation, server and client configuration, launching the VPN, and troubleshooting common issues. A fast and secure VPN for your needs.

https://3v-host.com/blog/setting-up-wireguard-on-a-vps/

WordPress Vulnerabilities and How to Detect Them

WordPress vulnerabilities in practice: how they are detected using WPScan, where to look for weaknesses, and which errors most often lead to website breaches and loss of control.

https://3v-host.com/blog/wordpress-vulnerabilities-and-how-to-detect-them/

What is a proxy, and how does it differ from a VPN?

Proxies and VPNs are often confused, but they are different tools. Let’s take a look at how they work, what the differences are, when to use each one, and how to implement them correctly in a real-world infrastructure.

https://3v-host.com/blog/what-is-a-proxy-and-how-does-it-differ-from-a-vpn/

Is Your Website Slow Because of Hardware?

How can you tell if your website is slow because of CPU, RAM, or disk issues - rather than because of the code? We’ll break down the signs, diagnostic steps, and real-world examples to help you quickly identify the bottleneck and make the right decision.

https://3v-host.com/blog/is-your-website-slow-because-of-hardware/

How to fix HTTP 500 Internal Server Error?

What does HTTP error 500 mean, why it occurs, and how to quickly diagnose it. Practical steps, examples, and tips for servers, CMS, and applications.

https://3v-host.com/blog/how-to-fix-http-500-internal-server-error/

UFW Basics or How to Configure a Firewall in Linux

What is UFW, its features, and benefits. We’ll walk through the basic configuration of a firewall in Linux: rule logic, port opening, access control, and common mistakes when securing a server.

https://3v-host.com/blog/ufw-basics-or-how-to-configure-a-firewall-in-linux/

How cyberattacks have changed and why web hosting is now at risk

How cyberattacks have evolved in 2025–2026, and why VPS, dedicated servers, and hosting in general have come under attack. We examine real-world attack scenarios and what this means for server owners.

https://3v-host.com/blog/how-cyberattacks-have-changed/