What is a DNS checker?

A DNS checker queries the Domain Name System for every record type of a domain — the addresses it points to (A, AAAA), its mail servers (MX), name servers (NS), verification strings (TXT) and security policies (CAA) — and reports exactly what is published.

Why can't I see a CNAME record for my domain's root?

DNS does not allow a CNAME on the zone apex (example.com itself) — the root must use A/AAAA records. CNAME records only appear on subdomains like www.example.com.

How long do DNS changes take to show up?

Each record carries a TTL (time to live) that tells resolvers how long to cache it — from seconds to days. After editing a record, public resolvers keep serving the old answer until its TTL expires, so propagation can take as long as the previous TTL.

Isihloli se-DNS — Ukubheka Kwamahhala kwe-DNS (A, AAAA, MX, TXT, NS Records)

Ilungiselela ukuhlola...

Kusho ukuthini uhlobo ngalunye lwerekhodi le-DNS

I-Domain Name System igcina okuningi kunekheli lesizinda. Lesi sihloli sibuza i-DNS ebukhoma nge-DNS-over-HTTPS ebethelwe futhi sibika lonke uhlobo lwerekhodi olushicilelwa isizinda:

A / AAAA — i-IPv4 / IPv6 iqondisa isizinda esikhomba kuso. Ngaphandle kokungenani okukodwa kwalokhu, isizinda asikwazi ukusingatha iwebhusayithi.
CNAME - isibizo esikhomba igama elilodwa kwelinye. Akuvunyelwe ku-zone apex, ngakho example.com ngokuvamile ngeke ibonise lutho.
MX — amaseva e-imeyili athola i-imeyili yesizinda, ngalinye linokubaluleka okubalulekile. Ayikho i-MX ngokuvamile isho ukuthi ayikho i-imeyili.
NS — amaseva wamagama agunyaziwe aphendula indawo.
TXT — umbhalo wefomu lamahhala: Izinqubomgomo zokulwa ne-SPF, ukusayina kwe-DKIM (ezizindeni ezingaphansi), amathokheni okuqinisekisa ubunikazi besizinda.
CAA - yiziphi iziphathimandla zesitifiketi ezivunyelwe ukukhipha izitifiketi ze-TLS zesizinda.
SOA — imethadatha yokuphatha yendawo: iseva eyinhloko, othintana naye kanye nezibali zesikhathi.

Kungani uhlola amarekhodi e-DNS?

Ngemva kokuthutha noma ukuhlela kwe-DNS - qinisekisa ukuthi amarekhodi amasha abukhoma kuzixazululi zomphakathi, hhayi nje kunqolobane yekhompyutha yakho.
Ukulethwa kwe-imeyili — qinisekisa ukuthi okufakiwe kwe-SPF/MX kulungile ngaphambi kokuthi imilayezo iqale ukubhampa.
Izibuyekezo zokuphepha — thola izinguquko ezingalindelekile ze-TXT/NS, futhi uqiniseke ukuthi i-CAA ibala kuphela ama-CA owasebenzisayo.

Ithiphu: Ukuhlelwa kwe-DNS akuveli khona manjalo yonke indawo - i-TTL yerekhodi ngalinye itshela abaxazululi ukuthi kufanele kugcinwe isikhathi esingakanani impendulo endala. Yehlisa i-TTL ngaphambi koshintsho oluhleliwe, bese uyiphakamisa futhi ngemva kwalokho.

Uthole amakheli? Bheka Isizinda kuya ku-IP ukuze uthole iphrofayela egcwele yokubamba ikheli, sebenzisa okuthi a isheke lohlu oluvinjelwe kuyo, noma ufunde yayo hlehlisa i-DNS.

FAQ

Imibuzo yokuhlola i-DNS

Yini isihloli se-DNS?

Isihloli se-DNS sibuza Uhlelo Lwegama Lesizinda salo lonke uhlobo lwerekhodi lwesizinda — amakheli esiwakhomba (A, AAAA), amaseva aso wemeyili (MX), amaseva wamagama (NS), izintambo zokuqinisekisa (i-TXT) nezinqubomgomo zokuphepha (CAA) — futhi sibika ngokuqondile lokho okushicilelwe.

Kungani ngingakwazi ukubona irekhodi le-CNAME lempande yesizinda sami?

I-DNS ayivumeli i-CNAME ku-zone apex (example.com uqobo) — impande kufanele isebenzise amarekhodi we-A/AAAA. Amarekhodi e-CNAME avela kuphela ezizindeni ezingaphansi njenge www.example.com.

Kuthatha isikhathi esingakanani ukuthi izinguquko ze-DNS zibonakale?

Irekhodi ngalinye liphethe i-TTL (isikhathi sokuphila) etshela abaxazululi ukuthi kumele baligcine isikhathi esingakanani — ukusuka kumasekhondi ukuya ezinsukwini. Ngemva kokuhlela irekhodi, izixazululi zomphakathi ziqhubeka nokunikeza impendulo endala kuze kube yilapho i-TTL yayo iphelelwa yisikhathi, ngakho ukusakazwa kungathatha isikhathi eside njenge-TTL yangaphambilini.