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#almalinux

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Operations

Configure a clean dedicated IP for an SMTP VPS on AlmaLinux

Step-by-step setup for a clean dedicated IP on an SMTP VPS in Vietnam running AlmaLinux 9: rDNS, SPF, DKIM, DMARC, port 25, and sender reputation checks.

BM BizMaC Team Aug 20, 2026 9 min read
Security

Secure an AlmaLinux 9 VPS with SELinux and Firewalld

Hướng dẫn bảo mật AlmaLinux 9: bật SELinux enforcing, cấu hình Firewalld đúng cách, mở port SSH/HTTP/HTTPS kèm lệnh kiểm tra.

Aug 18, 202610 min

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