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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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Python script to read through a list and grab reverse DNS entry

Background: I have always wanted to try my hand at scripting so here goes! Problem: When gethostbyaddr gets to an IP with no DNS entry it errors and my script doesn't continue on. Here is what I have so far: import socket file = 'ServerList' f =…
J LE
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tornado asynch reverse DNS lookup

I want to add to my web app a reverse DNS lookup to check the authenticity of googlebot user agents, as google suggests in their webmasters tools. Is there any standard way of doing this asynchronously? I have not been able to find anything in the…
WeaselFox
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how connect my own server to a domain?

I have a dedicated server in my office and it has a static IP on internet, now i want to connect this server to a domain and setup mail server on it. my only problem is how to connect IP and domain? I have some questions about this but can't find…
Farnabaz
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Setting up multiple subdomain and multiple top level domain

How do I configure Bind to use multiple subdomains and multiple top level domains. what am trying to do is this .example. and point this to my ipaddress.So that I can have many subdomains with as many top level domain, pointing to same…
user1711168
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What is the time cost of getaddrinfo()?

I am using getaddrinfo() API to resolve DNS queries in a cross platform C++ app. I need to know the time cost of getaddrinfo() in different platforms? Can anyone help me on this?
Naseef Chowdhury
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Blocking hostname if same as IP in .htaccess

I've been noticing in my log files that sometimes the Hostname will be exactly the same as the Ip. I guessing that it's because there is no rDNS set. That being said, how can I block this in htaccess? 5/17/2014 01:44 PM | UA: Mozilla/5.0 (Windows NT…
affiliatex
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Reverse DNS Lookup from a list of values - Python

i am trying to do a DNS lookup to an IP with Python, im using Python 3.x. im using a long list of URLs, which look like : yahoo.com google.com linkedin.com facebook.com cnn.com foxnews.com here is my scirpt : import socket file =…
tafiela
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where must a PTR record point to in order to avoid being classified as spammers?

I could not find a definitive answer to this question online and I'd appreciate some help. We have a dedicated server for our website. We also use it to send out bulk emails (ALWAYS by request, NEVER unsolicited or spam). We are trying to set up a…
user884248
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Bind Server on Azure to solve reverse DNS issue

I've currently run into an issue withe the Azure platform. It seems that they do not provide reverse DNS and support for it is not coming for a while it seems. I've been trying to setup a BIND DNS server on my box so that I can get reverse DNS…
user3033537
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How can I recognize different applications in NetFlow dumps?

I try to discover what kind of applications work in my network (e.g. Facebook, Youtube, Twitter etc.) . Unfortunatelly I can't do Deep Packet Inspection, everything I have are NetFlow traces. I was thinking about resolving ip addresses using DNS…
kozooh
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Ip address GetHostName Null Check

I want to get domain names from specific ip range with C# IPAddress addr = IPAddress.Parse("100.10.100."+i); entry = Dns.GetHostEntry(addr); But I encountered this error The requested name is valid and was found in the database, but it does…
dgn
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Domain name from IP

My site still gets requests from one IP address - 195.210.29.12. When I tried nslookup for that it shown me Name: data12.websupport.sk Address: 195.210.29.12 That is the hostname of one hosting provider. When I tried to realize which domain it…
michal.jakubeczy
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To get Clients hostname without using DNS look up using asp.net

I am searching since 3 weeks not getting any content.. I can get hostname using DNS server.. however it is accurate since our DNS server takes long time to update.. Is there any other way to find hostname.. PLS help.. other details: Intranet…
Raaj
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How to get all the domains hosted on the same server

How to find all the domains hosted on the same server. I tried to do a reverse ip lookup but it only give me the name of the host that the web server is running on. I would like to know something like this. Input = yahoo.com or its ip…
redoc
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How reverse dns record (PTR) should be?

My mails send to junk mail by hotmail. I've no reverse dns record and I want to add it. I use direct admin and I add a new zone. But I couldn't understand what is the true result? When I check ptr record with ip what should be the result?…
tebdilikiyafet
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