基于C#端口掃描器的實(shí)現(xiàn)

論文字?jǐn)?shù):11419,頁數(shù):24

摘  要
由于網(wǎng)絡(luò)技術(shù)的飛速發(fā)展,網(wǎng)絡(luò)規(guī)模迅猛增長和計(jì)算機(jī)系統(tǒng)日益復(fù)雜,導(dǎo)致新的系統(tǒng)漏洞層出不窮。黑客或者計(jì)算機(jī)病毒要想順利滲透入目標(biāo)計(jì)算機(jī)中,不管使用何種技術(shù)手段,必然要尋找目標(biāo)計(jì)算機(jī)的漏洞為自己打開入侵的大門。為了保證網(wǎng)絡(luò)中計(jì)算機(jī)的安全性,必須采取主動(dòng)策略,快速、及時(shí)、準(zhǔn)確、安全的檢測出網(wǎng)絡(luò)中計(jì)算機(jī)及防火墻開放的和未開放的端口。計(jì)算機(jī)端口掃描技術(shù)就是這種主動(dòng)防御策略實(shí)現(xiàn)的重要技術(shù)手段。
本課題通過端口掃描器的研究來提高對計(jì)算機(jī)安全的認(rèn)識。該端口掃描器采用C#語言開發(fā)，在VC 2005.net編譯環(huán)境下通過測試。利用TCP connect掃描原理，掃描主機(jī)通過TCP/IP協(xié)議的三次握手與目標(biāo)主機(jī)的指定端口建立一次完整的連接，如果目標(biāo)主機(jī)該端口有回復(fù)，則說明該端口開放。利用多線程技術(shù)實(shí)現(xiàn)了對一目標(biāo)IP進(jìn)行設(shè)定數(shù)目的端口掃描，對多IP段的特定端口進(jìn)行掃描。此外，還利用委托技術(shù)實(shí)現(xiàn)對界面元素的刷新。

關(guān)鍵字：端口掃描器；IP段掃描；C#的多線程編程
The Implement of Port Scanner Based on C#
Abstract
Along with the rapid development of network technology, the more complication of computer and the more enlarged size of Internet, the more leaks may existed in new system. When computer virus or hacker wants to invade to a system or host, no matter what means their take, it is obvious that they have to scan the system leaks at first. So as far as system security is concerned, no matter in Internet or Intranet, you should actively adopt a strategy to detect the state of the ports on your host computer or firewall. Computer port-scanning technology is one of important means to realize positive defense.
This topic focuses on the study of port scanner to improve understanding of computer security. The port scanner is developed and tested by C# in VC 2005.net environment. By using TCP connect scaning technique, the scanning host use TCP / IP three-shook hands protocol to establish a complete link with the target through the specified host ports. If the port of the specified host replies, it shows that the port is opened. The scanner utilizes multi-thread to implement port scanning for multiple target IP addresses at a given time or scanning a specified port in multiple different IP segments.

Keywords: Port Scanner; IP Scanner; C # Multithreaded Programming

目  錄

1引言 1
1.1 網(wǎng)絡(luò)安全 1
1.2 安全掃描技術(shù)的產(chǎn)生及其發(fā)展趨勢 1
1.3安全掃描技術(shù)分類 2
1.3.1  端口掃描技術(shù) 3
1.3.2  漏洞檢測技術(shù) 3
2 端口掃描 4
2.1 端口的基本概念 4
2.1.1  端口的簡介 4
2.1.2  端口的分類 4
2.2 端口掃描技術(shù) 5
2.2.1  開放掃描技術(shù) 5
2.2.2  半開放掃描技術(shù) 6
2.3隱蔽掃描技術(shù) 7
2.4 其掃描他技術(shù) 8
3 系統(tǒng)分析與設(shè)計(jì) 8
3.1 說明 8
3.2 基于C#端口掃描器的系統(tǒng)分析與設(shè)計(jì) 9
3.3 基于C#端口掃描器的期望 9
3.4 端口掃描器的實(shí)現(xiàn)與分析 9
3.5 關(guān)鍵技術(shù)介紹 10
4 端口掃描器的實(shí)現(xiàn) 10
4.1 端口掃描器的代碼及說明 10
4.1.1  多線程核心代碼及說明 10
4.1.2  委托技術(shù)的代碼及說明 10
4.1.3  掃描功能實(shí)現(xiàn)的代碼及說明 11
4.2 端口掃描界面及功能介紹 14
5 掃描技術(shù)的市場和前景展望 17
結(jié)    論 17
參考文獻(xiàn) 18
致    謝 19
聲    明 20