Walik DNS lookup
Reverse DNS lookup: lebokake alamat IP kanggo golek hostname-e lan priksa apa DNS maju lan mundur cocog.
Queries go to Cloudflare’s public DNS over HTTPS service when you press the button.
Babagan Walik DNS lookup
Reverse DNS lookup: lebokake alamat IP kanggo golek hostname-e lan priksa apa DNS maju lan mundur cocog.
Bagean saka seksi “Data & jaringan” SmartCalcy. Lumaku ing browser panjenengan tanpa akun, nganggo mata uang lan satuan panjenengan dhewe (ganti ing sisih ndhuwur kaca), lan menehi perkiraan mung kanggo informasi, mula priksa pandhuan resmi sadurunge ngandelake asile.
Carane nganggo Walik DNS lookup
Apa sing dietung lan kapan nganggo
Nemokake hostname saka sawijining alamat IP nganggo cathetan reverse DNS (PTR), lan mriksa yen hostname kasebut bali menyang alamat sing padha, sing diarani forward-confirmed reverse DNS. Server mail nganggo pamriksan iki kanggo mutusake apa pangirim bisa dipercaya.
Carane nganggo, langkah demi langkah
- Lebokna alamat IP, utawa kosongake kothak kanggo nganggo alamat panjenengan dhewe.
- Pencet “Golek hostname”.
- Waca hostname ing sisih ndhuwur.
- Priksa “Forward-confirmed” kanggo ndeleng apa jenenge bali menyang alamat kasebut.
Tegese saben input
- IP address – An IPv4 or IPv6 address. Leave it empty to use your own public address.
Carane maca asile
- Hostname – The jeneng set ing the address’s PTR record.
- Walik jeneng – The special name queried, such as 8.8.8.8.in-addr.arpa.
- Forward-confirmed – Yes when the hostname’s A or AAAA record points back to the same address.
Rumus
The address is reversed and queried under in-addr.arpa for IPv4, or ip6.arpa with each hex digit reversed for IPv6. 8.8.4.4 becomes 4.4.8.8.in-addr.arpa. The returned name is then looked up forward to confirm it.
Conto petungan
8.8.8.8 has the PTR record dns.google, and dns.google resolves back to 8.8.8.8, so the pair is forward-confirmed.
Asumsi lan watesan
- Many addresses, especially home connections, have no PTR record or a generic one.
- The lookup is made through Cloudflare’s DNS over HTTPS service when you press the button.
Kesalahan umum
- Expecting saben address nganti have a hostname.
- Treating the hostname as proof of identity. The owner of the address sets it, so only forward-confirmed names add trust.
- Setting a PTR record at your domain registrar. It is set by whoever holds the IP address block, usually your hosting or internet provider.
Pitakonan sing kerep ditakokake
Apa iku cathetan PTR?
Cathetan DNS sing ngarahake alamat IP bali menyang hostname. Iku kosok baline cathetan A.
Kenapa server mailku butuh reverse DNS?
Akeh sistem mail panampa nolak utawa menehi tandha mail saka alamat sing ora duwe reverse DNS utawa sing ora cocog.
Sapa sing bisa ngowahi cathetan PTR?
Organisasi sing ngontrol blok alamat IP, biasane panyedhiya hosting utawa ISP panjenengan.
Apa iki padha karo panelusuran hostname?
Iya. Nemokake hostname saka alamat IP ditindakake nganggo reverse DNS.