Harden Windows Server for Vietnam Production in 2026
Learn the essential Windows Server security hardening steps for production environments in Vietnam: RDP lockdown, firewall rules, auditing, patching, and Decree 53 alignment.
Advanced Nginx Security Hardening on an Ubuntu VPS for Production
Harden Nginx on an Ubuntu VPS for production: TLS 1.3, strong ciphers, security headers, rate limiting, bot blocking. Includes verify steps and troubleshooting.
Set Up a Secure OpenVPN Server on AlmaLinux 9 for China
Hướng dẫn dựng OpenVPN trên AlmaLinux 9 VPS tại Việt Nam, tối ưu cho người dùng Trung Quốc với cấu hình TCP 443, xác thực chứng chỉ và kiểm tra kết nối thực tế.
Deploy and secure n8n on a Debian VPS in Vietnam
Step-by-step guide to deploy n8n with Docker Compose and PostgreSQL on a Debian VPS, protected by Nginx, HTTPS and a firewall. For developers and sysadmins who want reliable workflow automation with a Vietnam IPv4.
How to configure the UFW firewall on an Ubuntu VPS
Lock down an Ubuntu VPS with UFW: default deny, allow SSH, rate limiting, and verify rules. Step-by-step commands for a secure 2026 setup.
How to change the default SSH port on a VPS
A practical guide to moving SSH off port 22 on a Linux VPS: why it matters, how to edit sshd_config safely, how to update firewall and SELinux, and how to avoid locking yourself out.
How to connect to a Linux VPS over SSH for the first time
Hướng dẫn từng bước kết nối VPS Linux lần đầu qua SSH, tạo key pair, phân quyền đúng và bảo mật ngay từ giây đầu tiên.
Protect web apps with ModSecurity WAF and OWASP CRS on Nginx
Harden your Nginx web server against SQL injection, XSS, and bot traffic using ModSecurity 3 and OWASP Core Rule Set, with real installation commands for Ubuntu 24.04.
Automate Security Updates With Unattended-Upgrades on Linux VPS
Learn to configure unattended-upgrades on Ubuntu 24.04 or Debian 12 to automate security patches, prevent exploits, and keep your VPS secure with zero manual effort.
Secure RDP Configuration for Windows VPS
Follow this practical guide to harden RDP (secure rdp) on your Windows VPS. Protect against brute force attacks, credential theft, and unauthorized access.
Layer 7 attack protection with Nginx rate limiting and Cloudflare
A practical guide to protecting your VPS from Layer 7 DDoS attacks using Nginx rate limiting at the origin and Cloudflare's edge WAF. Includes real configs and verification steps.
Enable 2FA for SSH Using Google Authenticator on Ubuntu 24.04
Learn how to enable two-factor authentication for SSH with Google Authenticator PAM module on Ubuntu 24.04. A practical guide to protect your VPS against unauthorized access.
Set up nftables firewall on a VPS to replace iptables
A step-by-step guide to moving from iptables to nftables on Ubuntu 24.04 or Debian 12. Learn rules, tables, chains, and persistent config for a secure VPS.