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#ssh-hardening

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Security

User and Sudo Permissions Management on Linux VPS

Learn how to create non-root users, assign sudo privileges, and enforce secure sudo policies on a fresh Linux VPS. Protect root with practical steps for Ubuntu 24.04, Debian 12, and AlmaLinux 9.

BM BizMaC Team Jul 26, 2026 8 min read
Security

Hardening a self-hosted VPN server: firewall, key rotation and what to log

A step-by-step guide to securing a self-hosted VPN server with nftables, SSH hardening, fail2ban, key rotation, and a deliberate logging policy. Built for cross-border teams between China and Vietnam.

Jul 17, 202611 min

Linux or Windows VPS, hosted in Vietnam

Full root or Administrator access over SSH and RDP, multiple Vietnam IPv4, NVMe infrastructure, billed monthly.

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