Cov xa tawm ntawm DNS tau xa tawm los ntawm tus neeg siv lub computer mus rau DNS server thiab hloov siab, xyuas kom meej daim phiaj qhia qhov tseeb ntawm lub xaib chaw ua haujlwm thiab nws tus IP chaw nyob. Koj tuaj yeem cuam tshuam thiab txheeb xyuas cov pob ntawv no uas siv cov phiaj xwm tshwj xeeb.
Tsim nyog
Qhov kev pabcuam Wireshark
Cov Lus Qhia
Kauj ruam 1
Thaum tus neeg siv siv lub npe sau ntawm cov peev txheej hauv qhov browser, cov ntaub ntawv hais txog nws raug xa mus rau DNS server ntawm UDP. Tus neeg rau zaub mov tshawb nrhiav nws cov chaw khaws ntaub ntawv rau IP chaw nyob sib piv rau tus sau, pom nws thiab muab rov qab rau qhov browser. Qhov browser txuas mus rau nrhiav tus IP chaw nyob. Yog li, lub DNS server ua haujlwm raws li hom chaw lis haujlwm, muab cov phiaj xwm ntawm cov thawj thiab chaw IP.
Kauj ruam 2
Cov txheej txheem no muaj ib qho tsis sib xws: nws yog qhov tsis tshua muaj neeg. Uas yog, lub DNS pob ntawv tau ua yuam kev txhais tau tias ntawm kev teev npe, hauv kev sib piv rau TCP pob ntawv. Qhov no txhais tau hais tias xws li ib pob tuaj yeem hloov los ntawm lwm qhov. Raws li qhov tshwm sim, tus neeg siv tsis raug cai ib hom chaw nyob thiab xaus rau ib qho sib txawv kiag li. Kev paub ntawm cov txheej txheem cuam tshuam tso cai rau koj los ntsuas kev tawm tsam nws, nce kev ruaj ntseg ntawm kev siv Is Taws Nem.
Kauj ruam 3
Txij li nws txhaum cai los cuam tshuam thiab txheeb xyuas lwm tus neeg cov ntawv DNS, nws yog qhov zoo tshaj plaws rau kev qhia hauv koj lub computer. Txhawm rau kev txheeb xyuas kev tsheb, koj xav tau ib qho kev pabcuam zoo Wireshark, koj tuaj yeem rub tawm ntawm lub chaw tsim khoom lub vev xaib. Tom qab daus qhov program, nruab nws thiab khiav nws. Hauv cov ntawv qhia zaub mov, nrhiav yam khoom ntes - Interfaces. Lub qhov rai yuav tawm nrog cov ntaub ntawv hais txog koj daim npav network. Tso tus noog nyob rau sab laug thiab nias lub pob Start.
Kauj ruam 4
Koj tau pib soj ntsuam lub network tsheb. Qhib koj lub browser thiab mus rau qee qhov chaw nyob. Hauv Wireshark lub qhov rais, koj yuav pom cov npe ntawm txhua pob ntawv nrog lawv cov kev cai. Rau kev yooj yim, cov kab tau hais hauv cov xim sib txawv. DNS pob ntawv yuav cim hauv xiav. Nyem kab ntawm ib pob ntawv - cov ntaub ntawv hais txog nws yuav tshwm rau hauv qab ntawm lub vijtsam, nrog rau nws cov ntsiab lus hauv kev tshaj lij rau hexadecimal. Koj tuaj yeem tshawb xyuas pob ntawv no, hloov kho, ntxiv, thiab lwm yam. Txhawm rau kom nres tsheb tsom, qhib Kev Tshawb Fawb - Kev cuam tshuam ib zaug ntxiv thiab nyem khawm nres.
