局域網(wǎng)垃圾郵件監(jiān)控及過濾技術(shù)的研究
發(fā)布時間：2018-10-04 23:26
【摘要】：隨著Internet的迅速發(fā)展，人們在互聯(lián)網(wǎng)之間的交流也越來越普及。電子郵件作為互聯(lián)網(wǎng)上的通信服務(wù)，以方便快捷的傳輸方式和低廉的價格得到了廣泛的應(yīng)用，，并且成為了人們?nèi)粘Ｉ钪械闹匾M成部分。但是電子郵件在給人們帶來極大便利的同時，也帶來了一系列的網(wǎng)絡(luò)安全問題。垃圾郵件的泛濫成災(zāi)就是其中之一。不僅對人們的日常收發(fā)郵件造成了困擾，部分惡性垃圾郵件還會攜帶不良信息、釣魚網(wǎng)站或者木馬病毒，給收件人帶來嚴(yán)重危害。因此為了減少網(wǎng)絡(luò)中的垃圾郵件，為用戶提供一個安全的收件環(huán)境，開發(fā)一個可用可靠的局域網(wǎng)垃圾郵件監(jiān)控和過濾系統(tǒng)是十分重要的。 本文深入分析了電子郵件在網(wǎng)絡(luò)中的傳輸原理，在此基礎(chǔ)上提出了一套采用旁路監(jiān)聽模式、使用軟硬件相結(jié)合的方式進行局域網(wǎng)垃圾郵件的監(jiān)控和過濾的思想和方案，并且實現(xiàn)了系統(tǒng)方案中最基本也是最重要的模塊。經(jīng)過實際網(wǎng)絡(luò)環(huán)境下的測試實驗，驗證了本系統(tǒng)方案中已實現(xiàn)的功能是可用的，在局域網(wǎng)環(huán)境下可以準(zhǔn)確地監(jiān)控并還原郵件文本，并且在準(zhǔn)確率與內(nèi)存使用率等指標(biāo)上達到了預(yù)期效果。 本文的主要工作如下： 首先闡述了課題的研究背景和研究意義，介紹了垃圾郵件過濾系統(tǒng)在國內(nèi)外的研究現(xiàn)狀。接著討論了局域網(wǎng)垃圾郵件監(jiān)控和過濾技術(shù)涉及的基本原理。 隨后，本文從接入網(wǎng)絡(luò)的位置出發(fā)，對比分析了局域網(wǎng)垃圾郵件監(jiān)控及過濾系統(tǒng)的幾種實現(xiàn)方案，闡述了最終采用旁路監(jiān)聽模式的可行性與優(yōu)點。在確定系統(tǒng)的網(wǎng)絡(luò)架構(gòu)之后，本文進一步確定了系統(tǒng)的軟件構(gòu)成，然后根據(jù)郵件還原的流程，對郵件還原這一重要模塊進行了詳細的分析與設(shè)計，并且使用Libnids網(wǎng)絡(luò)安全開發(fā)工具實現(xiàn)了郵件的還原。 最后，本文對系統(tǒng)中已實現(xiàn)的模塊進行了功能性測試和內(nèi)存使用量測試。 本文提出的局域網(wǎng)垃圾郵件監(jiān)控和過濾方案，具有對用戶資源占用少，對局域網(wǎng)正常通訊影響小，接入方式靈活方便的特點，根據(jù)方案的實際需要，已實現(xiàn)的模塊具有很強的可擴展性和可維護性。 另外，在郵件還原模塊的設(shè)計中，本文解決了一個關(guān)鍵技術(shù)：如何管理局域網(wǎng)同一時刻中正在接收的多封郵件。
[Abstract]:With the rapid development of Internet, communication between the Internet is becoming more and more popular. As a communication service on the Internet, email has been widely used with convenient and fast transmission mode and low price, and has become an important part of people's daily life. But email not only brings great convenience to people, but also brings a series of network security problems. The spamming of spam is one of them. It not only makes trouble for people to send and receive emails, but also brings bad information, fishing website or Trojan horse virus to the recipient. So it is very important to develop a reliable LAN spam monitoring and filtering system in order to reduce the spam in the network and provide a secure collection environment for users. This paper deeply analyzes the principle of email transmission in the network, and puts forward a set of ideas and schemes to monitor and filter spam in LAN by using the mode of bypass listening and the combination of software and hardware. And has realized the most basic and the most important module in the system scheme. Through the testing experiments in the actual network environment, it is verified that the functions realized in this system are available, and the mail text can be monitored and restored accurately in the LAN environment. And in the accuracy and memory utilization rate and other indicators to achieve the desired results. The main work of this paper is as follows: firstly, the research background and significance of the subject are described, and the research status of spam filtering system at home and abroad is introduced. Then it discusses the basic principle of LAN spam monitoring and filtering technology. Then, starting from the location of the access network, this paper compares and analyzes several implementation schemes of the local area network spam monitoring and filtering system, and expounds the feasibility and advantages of the final adoption of the bypass monitoring mode. After determining the network structure of the system, this paper further determines the software structure of the system, and then, according to the flow of mail restore, the important module of mail restore is analyzed and designed in detail. And the use of Libnids network security development tools to achieve the restoration of mail. Finally, the functional test and memory usage test of the implemented modules in the system are carried out. The local area network spam monitoring and filtering scheme proposed in this paper has the characteristics of less occupation of user resources, less influence on LAN normal communication, flexible and convenient access mode, according to the actual needs of the scheme. The implemented modules are extensible and maintainable. In addition, in the design of mail restore module, this paper solves a key technology: how to manage multiple messages that are being received in LAN at the same time.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.098
本文編號：2252302
[Abstract]:With the rapid development of Internet, communication between the Internet is becoming more and more popular. As a communication service on the Internet, email has been widely used with convenient and fast transmission mode and low price, and has become an important part of people's daily life. But email not only brings great convenience to people, but also brings a series of network security problems. The spamming of spam is one of them. It not only makes trouble for people to send and receive emails, but also brings bad information, fishing website or Trojan horse virus to the recipient. So it is very important to develop a reliable LAN spam monitoring and filtering system in order to reduce the spam in the network and provide a secure collection environment for users. This paper deeply analyzes the principle of email transmission in the network, and puts forward a set of ideas and schemes to monitor and filter spam in LAN by using the mode of bypass listening and the combination of software and hardware. And has realized the most basic and the most important module in the system scheme. Through the testing experiments in the actual network environment, it is verified that the functions realized in this system are available, and the mail text can be monitored and restored accurately in the LAN environment. And in the accuracy and memory utilization rate and other indicators to achieve the desired results. The main work of this paper is as follows: firstly, the research background and significance of the subject are described, and the research status of spam filtering system at home and abroad is introduced. Then it discusses the basic principle of LAN spam monitoring and filtering technology. Then, starting from the location of the access network, this paper compares and analyzes several implementation schemes of the local area network spam monitoring and filtering system, and expounds the feasibility and advantages of the final adoption of the bypass monitoring mode. After determining the network structure of the system, this paper further determines the software structure of the system, and then, according to the flow of mail restore, the important module of mail restore is analyzed and designed in detail. And the use of Libnids network security development tools to achieve the restoration of mail. Finally, the functional test and memory usage test of the implemented modules in the system are carried out. The local area network spam monitoring and filtering scheme proposed in this paper has the characteristics of less occupation of user resources, less influence on LAN normal communication, flexible and convenient access mode, according to the actual needs of the scheme. The implemented modules are extensible and maintainable. In addition, in the design of mail restore module, this paper solves a key technology: how to manage multiple messages that are being received in LAN at the same time.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.098
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