I-firewall yindlela yokuqala yokukhusela ukhuseleko lwakho
Njengoko ufunda izinto ezibalulekileyo zokukhusela ikhompyutha kunye nenethiwekhi , uya kuhlangana nemigqaliselo emitsha emitsha: ukubethela , ukuchweba, iTrojan , nabanye. I-Firewall yithuba eliza kubonakala kwakhona.
Yintoni i-Firewall?
I-firewall iyona ndlela yokuqala yokukhusela inethiwekhi yakho. Injongo eyintloko ye-firewall kukugcina iindwendwe ezingahambelwanga kwi-intanethi. I-firewall ingaba yifowuni ye-hardware okanye isicelo sesofthiwe esivame ukufakwa kwindawo yomnatha ukuba isebenze njengomgcini-wesango kuzo zonke izithuthi ezingenayo neziphumayo.
I-firewall ikuvumela ukuba umise imithetho ethile ukufumanisa i-traffic ekufuneka ivumeleke kuyo okanye ngaphandle kwintanethi yakho yangasese. Ngokuxhomekeka kohlobo lwe-firewall oluphunyeziweyo, unokukhawulela ukufikelela kwii-adzisi ezithile ze-IP kunye namagama wesizinda okanye unokubamba iintlobo ezithile zezithuthi ngokuthintela izibuko zeTCP / IP ezisetyenziswayo.
Umsebenzi weFlawall njani?
Kukho iindlela ezine ezisetyenziselwa zixhobo zokutshisa umlilo ukuze zithintele izithuthi. Esinye isixhobo okanye isicelo singasebenzisa ngaphezu kweyodwa kwezi zinto ukubonelela ngokukhuselekileyo. Iinkqubo ezine ukupakisha ipakethe, isango lesekethe-level, iseva yommeleli kunye nesango lokufaka isicelo.
Ukupakisha iPakethe
Ifayile yefayile ithatha zonke izithuthi ukuya kwaye zisuka kwinethiwekhi kwaye zivavanya ngokuchasene nemithetho oyinikezelayo. Ngokuqhelekileyo ifayile yepakethi ingahlola idilesi ye-IP yomthombo, i-port source, idilesi ye-IP yokuya kuyo, kunye ne-port port. Yiyo le khrayitheriya ongayihluza ukuyivumela okanye ukuyivumela i-traffic kwiidilesi ezithile ze-IP okanye kwiichwephelo ezithile.
Isango leNqanaba leNqanaba
Isango lesekethe livimba zonke izithuthi ezingenayo kunoma yimuphi ummiselo kodwa ngokwawo. Ngaphakathi, umatshini womthengi uqhuba isofthiwe ukuba avumele ukuba baqhagamshelane nomshini wesango lesekethe. Kwilizwe langaphandle, kubonakala ukuba zonke iinkonzo ezivela kwinethiwekhi yangaphakathi zivela kwiphondo yesiphaluka.
I proxy Server
Umncedisi we-proxy ngokuqhelekileyo usetyenziselwa ukuphucula ukusebenza komnatha, kodwa unokusebenza njengoluhlobo lwe-firewall. Iiseva ze proxy zifihla iidilesi zangaphakathi ukuze zonke iinkonzo zisebenzise ukuba zivela kwi-proxy server. I-proxy iseva yamaphepha acacisiwe. Ukuba Umsebenzisi A uya ku-Yahoo.com, iseva yommeleli ithumela isicelo kwi-Yahoo.com kwaye ifumana iphepha lewebhu. Ukuba Umsebenzisi B ke uxhuma kwi-Yahoo.com, iseva yommeleli usithumela ulwazi olufunyenwe kwakhona kuMsebenzisi A ngoko kubuyiselwa ngokukhawuleza kunokuba ufumane kwakhona kwi-Yahoo.com kwakhona. Unokuqwalasela iseva yommeleli ukuvimba ukufikelela kwiiwebhusayithi ezithile uze uhlunge i-traffic traffic ethile ukukhusela inethiwekhi yakho yangaphakathi.
Isango Lendlela
Isango lokufaka isicelo lusetyenziswe olunye uhlobo lwesiphakeli sommeleli. Umxhasi wangaphakathi uqala ukudibanisa nesango lokufaka isicelo. Isango lesicelo libonisa ukuba ukuxhunyezwa kufuneka kuvunyelwe okanye kungabonakali kwaye kuseke uqhagamshelwano kunye nekhompyutheni yokuya kuyo. Yonke inxibelelwano ihamba ngokudibanisa ezimbini-umthengi kwisango lendlela kunye nesango lokungena kwendawo. Isango lesicelo lihlola zonke izithuthi zingaphathelene nemigaqo yalo ngaphambi kokugqiba ukuba ngaba uya kuthumela. Njengoko kunye nezinye iintlobo zee-proxy, i-gateway yesicelo yiyona kuphela idilesi ebonwa yihlabathi langaphandle ukuze inethiwekhi yangaphakathi ikhuselwe.
Qaphela: Eli nqaku lelifa lihlelwe nguAndy O'Donnell