Binciken DNS na baya (reverse DNS)
Binciken reverse DNS: shigar da adireshin IP don nemo sunan host ɗinsa ku ga ko forward da reverse DNS sun yi daidai.
Queries go to Cloudflare’s public DNS over HTTPS service when you press the button.
Game da Binciken DNS na baya (reverse DNS)
Binciken reverse DNS: shigar da adireshin IP don nemo sunan host ɗinsa ku ga ko forward da reverse DNS sun yi daidai.
Ɓangare ne na sashen “Bayanai da hanyar sadarwa” na SmartCalcy. Yana aiki a burauzar ku ba tare da asusu ba, yana amfani da kuɗinku da ma'aunanku (canza su a saman shafin), kuma yana ba da ƙiyasi don bayani kawai, don haka duba jagorar hukuma kafin ku dogara da sakamako.
Yadda ake amfani da Binciken DNS na baya (reverse DNS)
Abin da yake lissafawa da lokacin amfani da shi
Yana nemo hostname na adireshin IP ta amfani da reverse DNS (PTR) record ɗinsa, kuma yana duba cewa hostname ɗin yana komawa zuwa adireshin iri ɗaya, wanda ake kira forward-confirmed reverse DNS. Sabobin imel suna amfani da wannan dubawa don yanke shawara ko za su amince da mai aikawa.
Yadda ake amfani da shi, mataki-mataki
- Shigar da adireshin IP, ko ku bar akwatin fanko don amfani da naku.
- Danna “Nemo hostname”.
- Karanta hostname a saman.
- Duba “Forward-confirmed” don ganin ko sunan yana komawa zuwa adireshin.
Ma'anar kowace shigarwa
- IP address – An IPv4 or IPv6 address. Leave it empty to use your own public address.
Yadda ake karanta sakamako
- Hostname – The suna set a the address’s PTR record.
- Juya suna – 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.
Dabarar lissafi
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.
Misali da aka warware
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.
Zato da iyakoki
- 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.
Kurakuran da aka saba yi
- Expecting kowane address zuwa 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.
Tambayoyin da ake yawan yi
Mene ne PTR record?
DNS record da ke danganta adireshin IP zuwa hostname. Shi ne akasin A record.
Me ya sa sabar imel ɗina ke buƙatar reverse DNS?
Yawancin tsarin karɓar imel suna ƙin ko yi wa alama imel daga adireshin da ba su da reverse DNS ko wanda bai dace ba.
Wa zai iya canza PTR record?
Ƙungiyar da ke sarrafa rukunin adireshin IP, yawanci kamfanin hosting ɗinku ko ISP.
Shin wannan iri ɗaya ne da binciken hostname?
Eh. Ana nemo hostname na adireshin IP ne da reverse DNS.