I-recursion ayitholakali: inqubomgomo ye-DNS, hhayi umhubhe ophukile

Igama langaphakathi liyaxazululeka, futhi lelo seva lifaka impendulo yegama langaphandle ngokwenqaba mayelana ne-recursion. Leyo nhlanganisela ayikona ukuphikisana. Ukushicilela izifunda zayo kanye nokuxazulula yonke i-inthanethi kuyizinsizakalo ezimbili ezihlukene iseva engazinikeza, futhi ingenza eyokuqala ngaphandle kweyesibili. Thatha ukwenqaba njengesitatimende senqubomgomo, bese uhlola ukuthi inqubomgomo iyahambisana yini nomklamo.

Ukwenqaba nokuphelelwa isikhathi kuyizimpendulo ezihlukene

Bhala igama, uhlobo lombuzo, iseva ephendulile, isimo kanye namarekhodi abuyisiwe. Isixwayiso se-recursion asiyenzi iphelele imimpendulo egunyaziwe eyafika nayo. Bhala isimo ngaphambi kokusihumusha. Isimo esakhiwe kabusha kusukela enkumbulweni ngemuva kwehora liyiqiniso elihlukile.

Isihloko se-DNS sithwala isicelo se-recursion kanye nenkomba yokuthi iseva iyakunikeza yini, futhi isicaciso sephrothokholi sigcina lawa mafulegi ehlukile kudatha yempendulo. Kungakho impendulo ingaba usizo futhi ithwele isikhalazo. Ukuphelelwa isikhathi, impendulo engeyona ne-ukwenqaba kuyimiphumela emithathu ehlukene. Ngayinye ikhomba isendlalelo esihlukile, futhi ukwenqaba kuphela yiseva ekutshela ngenqubomgomo.

Funda ikhodi yesimo kuqala, bese unquma ukuthi isixwayiso sibalulekile yini kulo mbuzo. Impendulo egunyaziwe ebiza isifunda iyasebenziseka ngisho lapho ibhithi ye-recursion yenqatshwa. Ukwenqaba ngaphandle kwempendulo kuwumphumela wenqubomgomo, hhayi indlela yamaphakethe ephukile.

Okubhalwe isixazululi njengomthombo wakho

Iklayenti lingavela echibini lamakheli ngaphandle kwebanga le-recursion elivunyelwe yiseva, noma ukuhumusha kungayenza ibe njengesango. Ikheli le-adaptha yeklayenti ngokwayo aliyona ubufakazi bokuthi isixazululi sathola ini. Buza umphathi weseva ngomthombo obonakele esikhundleni sokucabanga kusukela ohlangothini lwakho lwendlela. Lawa makheli amabili angahluka kuwo wonke amagxathu ahumushayo.

Buza igama elifanayo kuklayenti nakumsingathi osethenjwa yiseva kakade. Umehluko phakathi kwezimpendulo ezimbili uyisimo somthombo, futhi uyasebenziseka kakhulu kunanoma iyiphi impendulo yodwa.

dig +short host.corp.example
dig +short example.com

Uma ukusetshenziswa kufuna i-recursion yamaklayenti e-VPN, umphathi ugunyaza ibanga lomthombo elifanele ngokusebenzisa izilawuli zeseva ngokwayo. Ukuvula i-recursion kuyo yonke inethiwekhi ukuze ukuhlolwa okukodwa kudlule kuwushintsho olukhulu kakhulu kunalolo oluhlolwayo. Bhala ibanga eligunyaziwe eceleni komthetho, ngoba umhloli olandelayo uzobuza ukuthi inqubomgomo yayifanele isebenzela imithombo iphi. Ibanga lomthombo elingenamnini yindlela ukuhlolwa kwesikhashana okuba ngokunomphela.

I-DNS ehlukanisiwe iwumklamo, hhayi iphutha

Okunye ukusetshenziswa kuthumela kuphela izizinda zomsebenzi kusixazululi sangasese kanti konke okunye kusixazululi esinye esigunyaziwe. Lokho kuwumklamo wokuhambisa imibuzo, futhi akubona ubufakazi bokuthi iseva yangasese idinga inqubomgomo ekhululekile. Ngalowo mklamo, igama langaphandle elihlulekayo ngesixazululi sangasese lingumphumela ohlosiwe, hhayi iphutha. Ukwenqaba kuwumklamo osebenzayo, hhayi uphawu okufanele lucindezelwe.

Isixazululi esivamile singabuyisela ukuphequlula kuyilapho siphula amagama angaphakathi noma sithumela imibuzo yangasese lapho okungafanele iye khona. Bhala indlela yokuziphatha ehlosiwe ngaphambi kokushintsha noma yiliphi ikheli lesixazululi.

Qinisekisa inqubomgomo ngemibuzo emibili

Ngemuva kokulungiswa okuhlosiwe, buza igama langasese eligunyaziwe kanye negama langaphandle kuklayenti langempela. Okubuyayo kufanele kube yilokho inqubomgomo ekuthembisayo, hhayi nje ukuxilongwa okuthule kakhulu. Bhala iseva ephendulile nayo yonke impendulo, bese uqhathanisa labo ababili nenqubomgomo. Ukuqhathanisa kuwukuhlolwa, futhi ukusesha okukodwa okuphumelelayo akusikho.

resolvectl query host.corp.example
resolvectl query example.com

Uma igama langasese lisebenza futhi igama lomphakathi lenqatshwa, inqubomgomo yenza lokho ekushoyo. Uma negama langasese lihluleka, inkinga isesifundeni, emzileni noma ekugunyazweni komthombo, futhi i-recursion iwukuphazamisa. Yomibili imiphumela iyasebenziseka, futhi ngayinye isusa ingxenye yezinkolelo-mbono ezisele.

Funda ukwenqaba njengobufakazi

Ukwenqaba kuyimpendulo. Kusho ukuthi iseva yathola umbuzo futhi yenqaba ukwenza umsebenzi oceliwe, okuhlukile kuphakethe elingakafiki neze. Lowo mehluko uyiwo wonke ukuxilongwa. Kubhale njengempendulo, hhayi njengokwehluleka kokuxhumana.

Lowo mehluko ukutshela lapho ubheka khona: kumarekhodi eseva, kunqubomgomo yayo yokufinyelela kanye nomthombo ewubhalile. Ukushintsha kwe-firewall akukwazi ukulungisa ukwenqaba kwenqubomgomo, futhi ukushintsha kwenqubomgomo akukwazi ukulungisa umzila ongekho. Gcina izinkolelo-mbono ezimbili zihlukene kuze kube nokufakazi kokunye kwazo.

Bhala umphumela nomnini wenqubomgomo kwithikithi, ukuze umuntu olandelayo aqale esinqumweni hhayi esixwayisweni. Shono ibanga lomthombo eligunyaziwe namagama amabili owahlola. Ithikithi elinazo lezi zinto ezintathu lingaphinda lisetshenziswe; elithi "i-recursion iphukile" alikwazi.