網(wǎng)絡(luò)安全與防護(hù)技術(shù)探索

本文共計(jì)6頁，6695字；

摘要：
隨著計(jì)算機(jī)的飛速發(fā)展以及網(wǎng)絡(luò)技術(shù)的普遍應(yīng)用，隨著信息時(shí)代的來臨，信息作為一種重要的資源正得到了人們的重視與應(yīng)用。因特網(wǎng)是一個發(fā)展非?；钴S的領(lǐng)域，可能會受到黑客的非法攻擊，所以在任何情況下，對于各種事故，無意或有意的破壞，保護(hù)數(shù)據(jù)及其傳送、處理都是非常必要的。計(jì)劃如何保護(hù)你的局域網(wǎng)免受因特網(wǎng)攻擊帶來的危害時(shí)，首先要考慮的是防火墻。防火墻的核心思想是在不安全的網(wǎng)際網(wǎng)環(huán)境中構(gòu)造一個相對安全的子網(wǎng)環(huán)境。本文介紹了防火墻技術(shù)的基本概念和系統(tǒng)結(jié)構(gòu)，討論了實(shí)現(xiàn)防火墻的兩種技術(shù)手段：一種是基于分組過濾技術(shù)（Packet filtering），它的代表是在篩選路由器上實(shí)現(xiàn)的防火墻功能；一種是基于代理技術(shù)（Proxy），它的代表是在篩選路由器上實(shí)現(xiàn)的防火墻功能.
關(guān)鍵詞：網(wǎng)絡(luò),安全,防火墻

Abstract:
Along with the fast computer development and the universal application of the network technology, along with information times coming up on, Information is attracting the world’s attention and employed as a kind of important resources. Internet is a very actively developed field. Because it may be illegally attacked by hackers, It is very necessary for data’s protection, delivery and protection against various accidents, intentional or want destroy under any condition. Firewall is the first consideration when plan how to protect your local area network against endangers brought by Internet attack. The core content of firewall technology is to construct a relatively safe environment of subnet in the not-so-safe network environment. This paper introduces the basic
一、 防火墻的概念與構(gòu)成
篩選路由器（Screening Router）
篩選路由器和防火墻與OSI模型的關(guān)系
分組過濾（Packet Filtering）技術(shù)

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