基于內(nèi)容的網(wǎng)絡(luò)監(jiān)控系統(tǒng)的研究與實(shí)現(xiàn).pdf

1、東北大學(xué)碩士學(xué)位論文基于內(nèi)容的網(wǎng)絡(luò)監(jiān)控系統(tǒng)的研究與實(shí)現(xiàn)姓名：馬騳驫申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：常桂然2003.1.1查!!壟堂嬰主蘭堡壘墨壘呈!!墜曼!ResearchandDevelopmentofContent—basedNetMonitorAbstractWiththerapiddevelopmentofintemettechnology，whenfullyenjoyingtheconveniencewhich

2、theinteractbfngsus，weoftenfacemanyheadachesofcontentsecurity：companyemployeesdothingsirrelevantwiththeirworkoninteractonworkingtime；companyinsideinformationorsecretsareleakedoutthroughinternetbyemployeespurposelyoraccide

3、ntally；afewlawbreakercolludewithforeignoroverseasreactivistsbyinternetandsellnationalsecretsorinformation；content—basedattacks，includingvirusandwormattacks，hideinlotsofwebpagesandeomailshavebecomearegularmethodofnetattac

4、kWiththedevelopmentofnetworktechnology，theconceptofnetworksecurityisalsodevelopingNetworksecurityisgraduallyrealizedastheunificationofnetworksecurityandinformationsecurityandtraditionalnetworksecurityequipmentandtechnolo

5、gyarefacingunprecedentedchallengeThisarticlefirstlyintroducedTCP／IPprotocolrelativetopacketfilterandreassemblyandstressedIPpackage，fragmentandreassembly，theestablishmentandcloseofTCPconnection，thewayofTCPhowtorealizereli

6、abletransmissionInchapter4，itemphasizedthetechnologyofnetworkinterfacerelativetothecaptureofintemettransmissionframeonlinklayerBecausetheimplementationofpacketcollectionofbroadbandnetworkrelatescloselywithconcretchips，is

7、putinchapter5Chapter5，whichisthekeyofthearticle，mainlydiscussedthegeneralschemeofthehardwareimplementaionofnetworkmonitorequipment；implementationofPDHnetworkinterface；Scatter／GatherDMAtechnology，whichistheguaranteeofhigh

8、—speedpacketcollection；theproccessof1PfragmentandTCP／UDPpacketreassemblyAtlastchapterofthearticlediscussedaschemeofpacketfilterwithhardware，whichisaninexorabletrendtoimp!ementfasternetworkmonitor，whichisalsothepreparatio

9、nofSDHnetworkmonitorsystemthatIamgoingtodevelop(althoughthisdesignhasneverbeencheckedbypractice，allmodulesgiveninthearticlehavebeentestedthroughcomputersimulation)Thisarticledidn’tdiacusstherealizationoftheselectionfromv