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虚拟专用拨号网络(VPDN)是在公共网络上建立一条安全信息通道。为了保证其安全性,必须采用认证机制对用户和设备进行认证。本文介绍了虚拟专用拨号网络技术原理,并深入分析了RADIUS认证机制以及如何使用RADIUS实现虚拟专用拨号网络的安全认证。RADIUS是VPDN中使用最为广泛的认证机制,与其他安全机制相比有许多优点,文中提出了在 VPDN中使用RADIUS机制进行认证的一种实施方案。此方案实现简单,可实现二次认证,缺点是与一次认证相比速度较慢。
Virtual Private Dialing Network (VPDN) is a public safety information channel on the public network. In order to ensure its security, users and devices must be authenticated with an authentication mechanism. This article introduces the virtual private dialing network technology principles, and in-depth analysis of the RADIUS authentication mechanism and how to use RADIUS to achieve virtual private dial-up network security certification. RADIUS is the most widely used authentication mechanism in VPDN. Compared with other security mechanisms, RADIUS has many advantages. In this paper, an implementation scheme of using RADIUS mechanism to authenticate VPDN is proposed in this paper. The scheme is simple to implement and can realize secondary authentication. The disadvantage is that the speed is slower compared with one authentication.