ĐÁNH GIÁ HIỆU NĂNG VÀ TRIỂN KHAI HỆ THỐNG VPN NỘI BỘ BẢO MẬT SỬ DỤNG OPENVPN TRÊN UBUNTU SERVER

Abstract

This study designs, deploys, and evaluates a secure internal VPN on Ubuntu Server using OpenVPN. It aims to improve network security and remote access in academic environments. The methodology involves installing OpenVPN Access Server, establishing SSL/TLS encrypted channels, and applying iptables with a “Default Deny” policy. Experiments show secure connections with low latency (average increase of 2-3 ms), stable throughput of approximately 85 Mbps for file transfers and 70 Mbps for internal web access, ensuring all remote traffic is encrypted using the AES-256-CBC algorithm. The solution is robust, flexible, cost-effective, and enhances secure remote work while protecting data confidentiality and integrity.