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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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567 questions
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How to configure Reverse DNS (PTR) records correctly for multiple domains on a single IP

I run a Virtual Private Server on which I host a number of websites using a single IP address. I need to configure Reverse DNS for each domain. Is this possible and what is the best way to go about this? My server is running Cpanel/WHM and is…
Luke McCallum
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Why does my box keep sending reverse DNS queries and how to stop it?

Situation My box keeps sending reverse DNS queries about our LAN hosts. Obviously they all fail because they are private addresses. Request Source: 192.168.1.6 Destination: 192.168.1.1 (default gateway) Query: Standard query 0x2515 PTR…
Arkanoid
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broadcast.addr. in rDNS?

Our in-addr.arpa zones contain entries like the following. 0.2.0.192.in-addr.arpa. 120 IN PTR broadcast.old. 255.2.0.192.in-addr.arpa. 120 IN PTR broadcast.addr. We don't (nor do any of our forwarders) resolve "old." or "addr.". Does having…
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Should I create reverse DNS record for virtual domain?

My server has two domains, example.com and example.org. example.com using my server to send emails. example.org is a virtual domain. And it uses Google Workspace(Gmail) to send emails. I see this https://support.google.com/mail/answer/81126?hl=en…
alancc
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rDNS -- more than one IP per server?

Very simple question that I can't find a reliable answer to, with Google -- can my server be the reverse DNS for multiple IP addresses? Is it bad practise / wrong / asking for trouble to say my server sub.hostname.co.uk is the rDNS…
Martin
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2 Reverse DNS towards same IP. Is it bad?

We are moving our mail server to Amazon Cloud We currently have a reverse DNS for our mail server with current provider. When moving to Amazon, we have to cancel that one and get Amazon to create a reverse DNS for our domain towards the amazon…
Morten Abrahamsen
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Reverse DNS on 2 servers

I have 2 servers : Web Server (on AWS) for : mydomain.com on IP : X.X.X.1 Mail Server (on Plesk Ubuntu) for : mail.mydomain.com on IP : X.X.X.2 And I have a reverse DNS Spam issue so I would like to set my reverse DNS correctly. So I came to…
Maxime NGOE
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Are "Reverse DNS" string names copyrighted?

Are the PTR records for IP addresses copyrighted by anyone? For example, WHOIS data is copyrighted by ARIN and other regional registries (http://www.ripe.net/db/support/db-terms-conditions.html). WHOIS data is different than rDNS data, I'm…
lex
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Reverse DNS issue in Win 2003

I am maintaining a DNS and mail server in win 2003, and the ISP made me authoritative for the domain. They say: ----- Start of the email received from the ISP-------- 96/28.204.xxx.yyy.in-addr.arpa The reverse ip zone is currently being delegated to…
Mike
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Reverse DNS lookup doesn't match hostname

There's a service on our local intranet that depends on the hostname mapping to the ip address, it is failing for a centos host inside of a virtual machine. I have set the virtual network adapter as bridged. ➜ ~ dig +short nikhil-vm 172.27.12.134 ➜…
nikhil
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Private DNS Question

I received the below request, just curious how I can go about doing this. I have IPs direct from ARIN and my own rdns server. ** As you guys know I am a mailer, but I keep things very clean. My other provider I am currently getting Class C's from…
Faith In Unseen Things
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Changing reverse DNS in Debian Box

I am currently hosting a website within my university environment with the permission from my university sysadmins. This is my scenario: I am running a DNS server on my own and I am using one of the hosting provider's DNS server to point my DNS name…
user5203
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Where to setup reverse DNS for email server

I plan to host my own mail server on a VPS. I understand that I need to set up a reverse DNS entry to prevent commonly used mail services from categorizing my email as spam. Where should the reverse DNS be configured? On the VPS or on my domain host…
mr_js
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What should be the rDNS PTR records for a self-hosted email server with a website domain hosted elsewhere?

We have a self-hosted mail server at our business's single, static IP address (mail.companyA.com). Our website is hosted by another company at a different IP address (companyA.com). Our emails use the @companyA.com domain. Sometimes we send emails…
Brian
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How Reverse DNS works?

I was reading pretty a lot, but still can't get it. For example we have example.com, 127.0.0.1 and 1.0.0.127.in-addr.arpa for example Forward DNS is simple. example.com points to 127.0.0.1 What is 1.0.0.127.in-addr.arpa and how does 127.0.0.1 would…
regs
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