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.

Kaitaki DNS — Tirohanga DNS Koreutu (A, AAAA, MX, TXT, NS Records)

Kei te whakarite taki…

He aha te tikanga o ia momo rekoata DNS

He nui noa atu te rokiroki a te Pūnaha Ingoa Rohe i te wāhitau o te rohe. Ka patai tenei kaitaki i te DNS ora mo te DNS-over-HTTPS kua whakamunatia me te ripoata i nga momo rekoata katoa ka whakaputaina e te rohe:

A / AAAA — Ko te IPv4 / IPv6 e aro ana ki nga tohu rohe. Ki te kore tetahi o enei, kaore e taea e te rohe te manaaki i tetahi paetukutuku.
CNAME — he ingoa ingoa e tohu ana i tetahi ingoa ki tetahi atu. Kaore e whakaaetia i te tihi rohe, na example.com karekau he whakaatu.
MX — nga tūmau mēra ka whiwhi imeera mo te rohe, he kaupapa matua mo ia tangata. No MX te tikanga kaore he imeera.
NS — ko nga kaitoro ingoa whai mana e whakautu ana mo te rohe.
TXT — Kuputuhi-kore utu: kaupapa here anti-spoofing SPF, hainatanga DKIM (i runga i nga rohe-roto), tohu manatoko mana-rohe.
CAA — ko nga mana tiwhikete e whakaaetia ana ki te tuku tiwhikete TLS mo te rohe.
SOA — nga metadata whakahaere o te rohe: te tumau ingoa tuatahi, te whakapā me te keteroki taima.

He aha te take ka tirohia nga rekoata DNS?

I muri i te hekenga, te whakatika DNS ranei — whakaū kei te noho tonu nga rekoata hou i runga i nga kaiwhakatikatika a te iwi, ehara i te keteroki o to rorohiko anake.
Te tuku imeera — manatokona kei te tika nga whakaurunga SPF/MX i mua i te tiimata o nga panui.
Nga arotake haumaru — tirohia nga huringa TXT/NS ohorere, me te whakarite kia whakarārangihia e CAA nga CA e whakamahia ana e koe.

Aki: Karekau nga whakarereketanga DNS e puta i nga waahi katoa - ka whakaatu nga TTL o ia rekoata ki nga kaiwhakatau pehea te roa o te keteroki i te whakautu tawhito. Whakaitihia te TTL i mua i te whakarereketanga kua whakamaheretia, ka whakaara ano i muri.

I kitea nga wahitau? Tirohia Rohe ki IP mo te katoa o nga korero manaaki mo tetahi wahitau, whakahaerea a tirohia rarangi pango ki runga, panuihia ranei whakamuri DNS.

FAQ

Nga patai kaitaki DNS

He aha te kaitaki DNS?

Ka patai tetahi kaitirotiro DNS ki te Pūnaha Ingoa Rohe mo ia momo rekoata o te rohe — nga wahitau e tohu ana ki (A, AAAA), ona mēra (MX), ingoa ingoa (NS), aho manatoko (TXT) me nga kaupapa here haumaru (CAA) — me te whakaatu i nga mea kua whakaputaina.

He aha e kore e taea e au te kite i tetahi rekoata CNAME mo te pakiaka o taku rohe?

Kaore e whakaaetia e DNS te CNAME ki te tihi rohe (example.com ake) — me whakamahi e te pakiaka nga rekoata A/AAAA. Ka puta noa nga rekoata CNAME i runga i nga subdomains penei www.tauira.com.

Kia pehea te roa ka puta nga huringa DNS?

Kei ia rekoata he TTL (wa ki te ora) e whakaatu ana ki nga kaiwhakatakoto whakaaro te roa o te keteroki — mai i nga hēkona ki nga ra. Whai muri i te whakatikatika i tetahi rekoata, ka mau tonu nga kaiwhakatakoto whakaaro a te iwi ki te whakautu tawhito tae noa ki te paunga o tana TTL, no reira ka roa te tukunga ki te TTL o mua.