CODEWITHSUNDEEP
pointersdnscloudflarereverse-dns
mafaltti
mafaltti

Reputation: 31

Reverse DNS and PTR records on Cloudflare

I have server with a mail service running at domain o1.danilocarneiro.com. I use Cloudflare as DNS, so I have configured an A record on cloud flare to 152.67.52.238. This is actually the IP of the server.

The problem is because while running mail-tester.com check it warns about Reverse DNS and recommends to add PTR record. My first question is where should I add this record, I guess it's in Cloudflare but I'm really not an expert on DNS and network subjects.

Cloudflare PTR Record screenshot

I'd like to know how to create this record, I have tried a record with: Name: o1.danilocarneiro.com. Domain name: 238.52.67.152-in-addr-arpa. It doesn't work.

I also tried. Name: 152.67.52.238. Domain name: o1.danilocarneiro.com. It also doesn't work. Mail-teser and other checkers like mxtoolbox.com keeps saying PTR record not found.

Could anyone please explain to me or demonstrate how to create a valid PTR record for my mail server (o1.danilocarneiro.com -> 152.67.52.238)

Thank you so much!

Upvotes: 3

Views: 11124

Answers (1)

Santiago
Santiago

Reputation: 114

At Cloudflare in your DNS zone for danilocarneiro.com

Go to create a PTR record as following:

Type Name        Domain Name               TTL

PTR  o1   238.52.67.152.in-addr.arpa  auto(suggested)

By doing this you should see.

; <<>> DiG 9.10.6 <<>> PTR 238.52.67.152.in-addr.arpa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62521
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;238.52.67.152.in-addr.arpa IN  PTR

;; ANSWER SECTION:
238.52.67.152.in-addr.arpa 85728 IN PTR o1.danilocarneiro.com.

;; Query time: 29 msec
;; SERVER: XXX.XXX.XXX.XXX#53(XXX.XXX.XXX.XXX)
;; WHEN: Tue Aug 25 10:11:51 2020
;; MSG SIZE  rcvd: 90

You should also note this CloudFlare Article - PTR

Remember allow up yo 72 hrs in order for dns to propagate, but with cloudflare can be almost instantly.

Upvotes: 3

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