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Questions tagged [reverse-dns]

Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Computer networks use the Domain Name System to determine the IP address associated with a domain name. This process is also known as forward DNS resolution. Reverse DNS lookup is the inverse process, the resolution of an IP address to its designated domain name.

Source: Wikipedia.

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Configuring Reverse DNS for an emulated DNS server hierarchy using BIND

I'm emulating a network using Kathara (similar to Netkit) and I'm having trouble figuring out how to get reverse DNS to work across all three networks. This is the topology And this is the DNS hierarchy I did manage to get recursive lookup to work.…
rzv.th
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Reverse DNS for multiple subdomains

We're setting up a system where each of our users gets their own subdomain of companymail.com for sending / receiving emails, and they can set up multiple mailboxes under that subdomain. We also want to allow them to use their own domain. E.g.: Main…
Andrew Porritt
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curl taking long time when not specifing i.p. address

I am using cURL to catch a remote server response. I've noticed that this method takes me 20 seconds eveytime. I've googled and found that something with the DNS lookup is misconfigured on my server (apache). When i'm writing the exact i.p of the…
user31279
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Google Cloud DNS explanation

I tried using Google Public DNS to Resolve DNS Records where I tried 36032b.cc.. Below is the result but can somebody explain to me the results? I can not find in the internet any guide on these results.. What does Status:0 means? What is TC, RD,…
Dean Christian Armada
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Why is the reverse zone name appended to the returned domain names in reverse DNS lookup?

Not sure if I missed something when I set up the PTR records for the hostnames on FreeIPAv4. We use FreeIPAv4 to manage the identity and policy on the LAN. When I conducted the reverse DNS lookup against the reverse zone 2.10.10.in-addr.arpa, some…
Insights.AI
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Dig from a specific domain shows no answer but normal dig works

I am having an issue with a WHM installation that was done over a week ago. It seems all is good on the WHM side of things but I am having issues with my nameservers I have set up Whenever I try to change a domains nameservers over to mine it…
Gareth Bredenkamp
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Implementing Reverse DNS in a Live Environment

I've been tasked with implementing reverse DNS internally in our Windows environment. What are some risks I should watch out for, and what is the best way to setup a test environment for changes like these? Should I just spin up a new domain…
PermanentBeginner
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Cisco Umbrella Identifies DNS Request as Malicious and Looks Like it's From our Domain Controller

Our Cisco Umbrella service is identifying DNS requests to rev1.globalrootservers.net and rev2.globalrootservers.net as malicious. I am trying to figure out whether this is really a problem or if it is a false positive. Below is all the…
user611054
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Do I need a PTR (rDNS [Reverse DNS]) record if using an SMTP mail relay (Mailgun, Mailjet, Send Grid, etc.)?

My cloud hosting provider wants to charge for setting up a PTR record, which I'm not up for. As I use Mailjet as an SMTP relay server, do I even need to have it setup? Or will all my emails reverse to their SMTP server?
Jack_Hu
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Reverse DNS from a cloned linode

I have cloned a linode1 that is linked to mydomain.com and the reverse DNS is li19034-215.members.linode.com; the reverse DNS of the cloned linode is also li19034-215.members.linode.com; I wouls like to delete the reverse DNS and assign it to the…
Fèlix Boniquet Pelfort
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Using own bind name server allowing reverse dns for own mail server

I successfully created my own email server running on Ubuntu but other mail servers refuse incoming mails from my server because there is no reverse dns (PTR record). The configuration looks like own domain name, let's say example.com one internet…
Flaviu
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Is it possible to make reverse dns lookup on cloudflare

Somehow Cloudflare is hiding the real ip of my server. Is there a possibility to check other domains on my ip by reverse DNS? in short I make dig some-server-name.com I got in reply some A records...but they are not actually my server ip's than I…
adeptofvoltron
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Reverse DNS does not contain the hostname and RDNS_NONE from spam assasing

So i am trying to setup the reverse dns for my server and i got it mapping correctly to my mail domain and i did a test on mail-test but reverse dns failed with: Spam Assasin RDNS_NONE, but on mail authentication bellow shows is correctly…
Mov Eax
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Temporary failure in name resolution affecting most public traffic

We're having a bizarre issue with one of our domains that has been going on for the past 15+ hours at this point. The domain is not resolvable in many parts of the country. I tried pinging it on a few different Linux servers and got: example.com:…
InterLinked
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Reverse DNS on EC2

I'm developing a restful API as a fun challenge. For that, I've got a server running on AWS and also a custom domain registered as I would like to use it as the address for my API calls. I've been following this guide on youtube to use my custom…
Arthur Coimbra
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