PTR record kya hota hai?

Wo DNS record jo IP address ko hostname se jodta hai. IPv4 ke liye in-addr.arpa aur IPv6 ke liye ip6.arpa me rehta hai.

in-addr.arpa naam kaise banta hai?

Chaar octet ulte karke in-addr.arpa jodne se: 192.0.2.15 banta hai 15.2.0.192.in-addr.arpa.

Email ke liye reverse DNS kyun zaroori hai?

Receiving mail server ise bhejne wale ki buniyaadi jaanch maante hain: bina PTR wali IP compromised machine jaisi lagti hai, mail server jaisi nahi.

RFC 2317 delegation kya hai?

/24 se chhote block ka reverse DNS delegate karne ka tareeka: parent zone CNAME publish karti hai jo range ko encode karne wali sub-zone par jaate hain.

Reverse DNS Generator

Ek IP ya poore prefix ko PTR naam, zone file aur RFC 2317 delegation me badlein.

Reverse DNS Generator poori tarah aapke browser me chalta hai: address aur naam aapke device par process hote hain aur koi DNS query nahi hoti.

CIDR Subnet Calculator kholein

Reverse DNS Generator ke baare mein

Reverse lookup do khaas ped par chalti hai. IPv4 address apne octet ulte karke in-addr.arpa ke neeche jaata hai, to 192.0.2.15 banta hai 15.2.0.192.in-addr.arpa; IPv6 har nibble ulta karke ip6.arpa ke neeche jaata hai aur wahi 32 label wale naam banate hain jo koi haath se nahi likhta. Yeh tool ek address ya poore prefix ke liye ye naam banata hai, SOA aur har host ke PTR ke saath zone file likhta hai, aur wo case bhi sambhaalta hai jo hosting customers ko uljhata hai: /24 se chhota block apni zone nahi rakh sakta.

Features

IPv4 aur IPv6 dono ke PTR naam, apne aap pehchaan kar
ip6.arpa ke liye poora nibble expansion, :: notation sameth
/24 se chhote prefix ki saari reverse zones
Naam pattern se poore range ke PTR records
SOA, NS aur har address ke PTR ke saath BIND zone file
RFC 2317 ka CNAME delegation block

Reverse DNS Generator kaise use karein

Ek IP daalein PTR naam ke liye, ya CIDR prefix poore block ke liye
host-{last}.example.com jaisa naam pattern set karein
PTR records copy karein ya zone mode me jaayein
/24 se chhote prefix par delegation apne provider ko dein

Example

Input

192.0.2.0/29

Output

0.2.0.192.in-addr.arpa. IN PTR host-0.example.com.
1.2.0.192.in-addr.arpa. IN PTR host-1.example.com.
…

/29 kisi aur ke /24 ke andar hota hai, isliye apni zone ke bajaye CNAME se delegate hota hai.

Common errors aur troubleshooting

Server ka mail spam me ja raha hai. — Dekhein ki IP ka PTR ho aur wo naam wapas usi address par resolve kare. Kai receivers bina reverse record wali IP ko penalise karte hain.
Provider kehta hai /28 delegate nahi ho sakta. — Ho sakta hai, par normal zone ki tarah nahi: yahan bane RFC 2317 CNAME tareeke se hota hai.

Aksar pooche jaane wale sawaal

PTR record kya hota hai?: Wo DNS record jo IP address ko hostname se jodta hai. IPv4 ke liye in-addr.arpa aur IPv6 ke liye ip6.arpa me rehta hai.
in-addr.arpa naam kaise banta hai?: Chaar octet ulte karke in-addr.arpa jodne se: 192.0.2.15 banta hai 15.2.0.192.in-addr.arpa.
Email ke liye reverse DNS kyun zaroori hai?: Receiving mail server ise bhejne wale ki buniyaadi jaanch maante hain: bina PTR wali IP compromised machine jaisi lagti hai, mail server jaisi nahi.
RFC 2317 delegation kya hai?: /24 se chhote block ka reverse DNS delegate karne ka tareeka: parent zone CNAME publish karti hai jo range ko encode karne wali sub-zone par jaate hain.

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