利用delphi实现代理服务器的设计

随着互联网技术的不断发展，网络所带给我们的好处有目共睹，但由于计算机网络具有联结形式多样性、网络的开放性、互连性等特征，致使网络易受黑客、恶意软件和其他不轨的攻击，因此，网络必须有足够强的安全措施，无论是在局域网还是在广域网中，都存在着自然和人为等诸多因素的脆弱性和潜在威胁：故此，网络的安全措施应是能全方位地针对各种不同的威胁和脆弱性。这样才能确保网络信息的保密性、完整性和可用性。 该文就解决局域网网络安全的一项重要技术——利用代理服务器来实现防火墙技术进行了全方位．深层次地探讨，并提供了一种实用的防火墙设计方案。

The Realization of Proxy Server Designed by Delphi

With the development of the Internet technology, the benefits brought by the Intemet are obvious to all.But because of some special characteristics, such as the variety of connecting type, openness and connectivity, the computer network is easily attacked by hackers, malicious software and other illegal invasion. There exists the frangibility and latent threat in both LAN and WAN due to the nature and artificial causes. Therefore, some necessary security measures, which is strong enough, must be taken in order to insure the secrecy, integrality and usability of network information, in view of different kinds of threats and frangibility.
This article comprehensively and deeply discusses an important technology about the school network security, using proxy server as a firewall technology, and provides a practical firewall design proposal.