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Questions tagged [nameservers]

In computing, a name server (also spelled nameserver) is a program or computer server that implements a name-service protocol. It maps a human-recognizable identifier to a system-internal, often numeric, identification or addressing component.

The Internet maintains two principal namespaces, the domain name hierarchy1 and the Internet Protocol (IP) address system.[2] The Domain Name System maintains the domain namespace and provides translation services between these two namespaces. Internet name servers implement the Domain Name System.[3] A DNS name server is a server that stores the DNS records, such as address (A, AAAA) records, name server (NS) records, and mail exchanger (MX) records for a domain name (see also List of DNS record types) and responds with answers to queries against its database.

The top hierarchy of the Internet Domain Name System is served by the root name servers maintained by delegation by the Internet Corporation for Assigned Names and Numbers (ICANN).

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How do I get a list of all subdomains of a domain?

I want to find out all the subdomains of a given domain. I found a hint which tells me to dig the authoritative Nameserver with the following option: dig @ns1.foo.example example.com axfr But this never works. Has anyone a better idea/approach
cgicgi
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Python lookup hostname from IP with 1 second timeout

How can I look up a hostname given an IP address? Furthermore, how can I specify a timeout in case no such reverse DNS entry exists? Trying to keep things as fast as possible. Or is there a better way? Thank you!
ensnare
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Difference between an A Rec and CNAME in Route53

As Amazon Route 53 allows you to set an A record or a CNAME to a different sub-domain name using Alias, I am wondering what is the difference between A record and CNAME now. To clarify my question, the difference between CNAME and A record in a…
Scalable
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Entering Route53 Nameservers gives me errors on Godaddy

I have set up an elastic IP for my EC2 instance on Amazon Web Services. I have also set up the correct Record Sets in Route53. However, when I try to add the name servers that are given to me into GoDaddy to point to my domain, I am getting an…
user1072337
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Different name servers for different subdomains

Let's say I have a website example.com which I bought via a common domain registry nomcheap.com. I want all traffic to a specific subdomain app.example.com to go to name server ns1.appserver.com so I can serve a specific user app. I also want all…
openwonk
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Why does updating a domain's nameservers take so long?

When I change my domain's (a dot com) nameservers it can take up to 2 days. I know that that's usual, but WHY is that? Just curious because my webhosting went down and I have to wait now because I changed nameservers, why? EDIT: Did some little…
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How to test CloudFlare without changing your domain's name server

How can you test CloudFlare without changing your domain's name server? I would not want to change my domain's name server and wait hours for propagation only to find out there is a issue with the DNS settings. Can you spoof a nameserver or…
cappuccino
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A(Host) Records with AWS Load Balancer

I have a question regarding AWS Load Balancers. I can point my CNAME www to my load balancer's DNS perfectly and i know it will always work, BUT I also need to point the @ record to the load balancer so people can access mysite.com instead of…
albertosh
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How can I test a new nameserver before updating the registrar records?

I have configured a set of DNS records at a new DNS provider. The configuration is complex, with load-balancing, SSL, etc, there are things that could go wrong. I want to test this configuration before changing the namespace records at…
iHiD
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Can I use IP address as Name Server instead of creating custom Name Server

I've just bought a VPS to host my website. One of the problems I've faced during migration from shared hosting to VPS is to setup a Private Name Server. I've instructed to create two Private Name Servers with the IP I've provided. Example:…
TheKid
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Where do i find nameservers of my Heroku App?

This can be done thru Zerigo. But can't i find the nameservers myself from somewhere and update it at the accound where i purchased my domain from ?
user2488786
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Checking Nameserver setup from command line

Is there a way to check if my domain is setup correctly on the nameservers? Ideally I'd like to run a command from command line, alternatively can use a third party tool. for example, I'm trying to register a domain that's to be hosted on…
Joshua
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Can I lookup NS and A at the same time using dig

Is it possible to lookup the A (ip address) and NS (nameservers) of a domain using a single dig command? I can use dig google.com A +short or dig google.com NS +short but surely it's possible to do it with just one command? If not, is there a…
Stevie
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Setting up a custom nameserver with BIND9

Lets say that I purchased a new domain (somedomain.com) from a domain registar and I wanted to setup my own nameserver on a server that has two IP addresses. First I buy the domain. I get the server. install BIND9. I login to the server and prepare…
matsko
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Understanding the DNS lookup mechanism

The specific query that led me to try and unpick this process was: Will a DNS lookup for a subdomain, such as assets.example.com, be faster if the parent domain, example.com, has already been resolved? By my (naive) understanding, the basic process…
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