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Questions tagged [reverse-dns]

Part of the the Domain Name System (DNS), a hierarchical naming system for discovering IP Addresses in relation to domain names. The Reverse DNS system takes an IP address and returns its configured domain name.

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differences between hostname and fully qualified domain name(FQDN)

First of all I searched the site for similar topic, and read the RFC 1535 and FQDN wiki, they don't seem to answer the question. Let me use www.youtube.com as an example. Python script I used: import socket for host in ["www.youtube.com"]: …
oNion
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How to deal with AWS EC2 instance retirement when using Elastic Beanstalk

I have received an email from AWS that states We have important news about your account (AWS Account ID: XXXXX). EC2 has detected degradation of the underlying hardware hosting your Amazon EC2 instance (instance-ID: i-XXXX) in the eu-west-1…
RobbiewOnline
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PTR record for EC2 instance (without elastic ip) not propagating

I've setup a PTR record for my EC2 instance following this article: https://aws.amazon.com/premiumsupport/knowledge-center/route-53-reverse-dns/. but when I test the rDNS with a tool like dig it keeps giving me the xxx.compute.amazonaws.com domain…
Sandhje Bouw
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How terrible is my Perl? Script that takes IP addresses and returns Fully Qualified Domain Names

I invite you, tear me a new one. This code gets the job done. It takes a .txt file containing a list of IPs and writes a file containing their respective fully qualified domain names. I want to know in what ways is this code poorly written. What bad…
21eleven
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Reverse dns lookup with scapy in python

How can I do reverse DNS lookup using scapy in Python? I look for it in Google but I couldn't find related to this topic.
Shnkc
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How to send clean email messages from your application?

When developing an application that sends out notification email messages, what are the best practices for not getting flagged as a spammer by your hosting company. (Cover any of:) best technique for not flooding a mail server best mail server…
Jol
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Reverse DNS, sending emails and hostname

I don't understand this "reverse dns" thing at all. So, I have a website - www.someurl.com, and I have an ip address - http://180.160.160.190 (fake). Now, I want to setup a "reverse dns" thing, so that emails that I send out won't be marked as spam.…
bharal
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In Python, Getting More Info About An IP Address

I know about gethostbyaddr in Python and that is somewhat useful for me. I would like to get even more info about an ip address like one can find at various websites such as who hosts that ip address, the country of origin, ..., etc. I need to…
demongolem
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Python Asynchronous Reverse DNS Lookups

I am looking to do a large number of reverse DNS lookups in a small amount of time. I currently have implemented an asynchronous lookup using socket.gethostbyaddr and concurrent.futures thread pool, but am still not seeing the desired performance.…
Wert
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Get Link-Local Domain Name from IP Address (i.e. Reverse DNS Lookup with Multicast DNS & DNS-SD)

I have a server application running on a device on the LAN that is discoverable via DNS-SD (i.e. Zeroconf/Bonjour/Avahi). Client devices, also on the LAN, connect to this server. I have no control over what application is used to connect to my…
BigMacAttack
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Setting up reverse dns on windows azure?

Does anyone know if this is possible? Browsing around on the internet I found out that it had been put on the roadmap but that was quite a way back. Has anyone achieved this? It seems odd that such a big player in the hosting industry doesn't offer…
rick
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Why getting error that No name servers found at child?

I have a setup that had 2 DNS servers dns3-master and dns4-slave, in that setup I was able to add reverse delegation on the ripe site, then we had added one more dns server and we made it dns5-slave to the dns3-master. So why I am getting following…
skuli434
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Reverse DNS for my elastic IP?

We hosted our website over Amazon EC2 but now we are facing problem in delivering mails to yahoo and hotmail but Gmail is fine. But as per my knowledge this might be due to reverse DNS lookup. i also got a good explanation here but now when i am…
Peeyush
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GCE custom hostname reverse lookup in private DNS zones

I want to create an instance in Google Cloud Engine with a custom (private) hostname. For that reason, when creating the instance from the Console (or from an SDK) I supply the hostname, or example instance0.custom.hostname. The instance is created…
Antonis Kouzoupis
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How to get another pod name from it's IP?

I have a pod that exposes a port (Server). Other pods (Clients) can communicate with it. The server can find remote IP and port on a socket (when the client connects to it). I am looking for a way to get the client's pod name (from its IP and…
Victor Ronin
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