不能上网的原因分析与解决 (1)（analysis and resolution of the reasons for not accessing the internet (1)）

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1、不能上网的原因分析与解决(1)（AnalysisandresolutionofthereasonsfornotaccessingtheInternet(1)）First,thenetworksettingsThisisbecauseoftheneedtomanuallyspecifyIP,gateway,DNSservernetworking,andtheuseofproxyserverInternetaccess.Checkyourcomputer'snetworksettingscarefully.Ifthedooropenbroadbandtelecommunicatio

2、nsstaff,mostwillgiveyouaseriousset,thedefaultwaytoobtainIPaddressautomatically,automaticaccesstoDNS,thiswayofaccesstotheInternet,butifoftenbroken,andtemporarilydonotcheckoutwhatyouhavetopaymoreattentiontothenetworksettings,theattentiontwo.Two,DNSserverproblemsWhenIEisunabletobrowsetheweb,try

3、usingtheIPaddressfirst,suchasusinghttp://203.208.33.101toseeifyoucanaccesstheGooglepage.Ifyouhaveaccess,thenitshouldbeDNSproblems,theproblemmaybecausedbyDNSforDNSerrorwhennetworkingorDNSserveritself,thenyoucanmanuallyspecifytheDNSservice,theDNScanbesearchedontheInternet,differentprovinceshav

4、edifferentprovisions.SettheDNSneedstocarryontheattributesofthenetwork,(thecontrolpanel->networkanddialupconnections->-rightclickthelocalconnectionattribute-TCP/IPprotocolattributeusingthefollowingDNSserveraddress).DifferentISPoperatorshavedifferentDNSaddresses.Sometimesthereisarouterornetwor

5、kcardproblem,cannotbeconnectedwiththeISPDNSservice,dealwiththissituation,therouterpowercutoffwhiledriving,orifnot,thentrytoresettherouteror.AnotherpossibilityisthatthelocalDNScacheishavingproblems.IfthelocalDNScacheisaproblem,thesitewillnotbeaccessible.Ipconfig/flushdnscanbeexecutedinruntore

6、buildthelocalDNScache.Three,theIEbrowseritselfWhentheIEbrowseritselffails,itisboundtoaffectbrowsing;ifIEismaliciouslymodified,itcancauseafailuretobrowsetheweb.Atthispoint,youcangotosafemode,tryIEfixes,orreinstallIE-it'snoteasytofixthisproblem,andtheinstallationdoesn'talwayssucceed.Four,thepr

7、oblemofnetworkfirewallIfthenetworkfirewallissetproperly,ifthesecuritylevelistoohigh,accidentallyputtheIEintotheblockaccesslistoffirewallpolicyerror,trytocheckthepolicytoreduceordirectlyoffthefirewallsecurityleveltoseeifitreturnedtonormal.Firewall,p