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Questions tagged [nameserver]

A name server is a computer server that hosts a network service for providing responses to queries against a directory service.

A name server is a computer server that hosts a network service for providing responses to queries against a directory service. It maps a human-recognizable identifier to a system-internal, often numeric, identification or addressing component. This service is performed by the server according to a network service protocol.

Examples of name servers is the Domain Name System (DNS), one of the two principal name spaces of the Internet. The most important function of these DNS servers is the translation (resolution) of human-memorable domain names and hostnames into the corresponding numeric Internet Protocol (IP) addresses, the second principal Internet name space which is used to identify and locate computer systems and resources on the Internet.

Source: Wikipedia.

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DNS A vs NS record

I'm trying to understand DNS a bit better, but I still don't get A and NS records completely. As far as I understood, the A record tells which IP-address belongs to a (sub) domain, so far it was still clear to me. But as I understood, the NS record…
Tiddo
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How to manage DNS in NetworkManager via console (nmcli)?

I have CentOS 7.2 (guest in VirtualBox, vagrant box centos/7, no GUI). I see there is a nameserver in file: $ cat /etc/resolv.conf # Generated by NetworkManager nameserver 10.0.2.3 But how to add or replace with new one? I have done this manually…
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Can you lookup a domains past nameserver & mx record history?

If is possible to find out which nameservers a domain was previously pointing too? I need to try and find where a domain was previously hosted so that I can try and gain access to an old hosted email account. Any ideas?
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Is dig +trace always accurate?

When the accuracy of a DNS cache is in question, dig +trace tends to be the recommended way of determining the authoritative answer for an internet facing DNS record. This seems to be particularly useful when also paired with +additional, which also…
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What percentage of nameservers honor TTL these days?

Some years ago I had to do several DNS changes over the course of several weeks as I moved bits of equipment from one data center to the other. At the time that I did this, about 95% of the nameservers in the world seemed to respect the TTL value,…
user10501
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Do CNAME records require time to propagate?

When I typically update DNS ("A" records) I will allow for an extended period of time for the changes to propagate throughout the root nameservers. Do I need to make this same allowance for updates and changes to CNAME records?
Jaryd Malbin
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Best Practices in Speeding-up DNS Propagation

Possible Duplicate: How long does it take for an A record to propagate? I recently changed nameservers and it has been 24 hours since. Some of my visitors are complaining they are still viewing the old site while some are already seeing the new…
IMB
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Is it true that a nameserver have to answer queries over TCP?

I'm the process of setting up a monitoring of DNS servers of several large web hosts. My goal is to compare their dns servers response times by tracking their response to ping. In the process, I discovered that Bluehost nameservers do not respond to…
Taras Mankovski
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What is the difference between Authoritative Nameserver and Recursive Resolver?

I am new to networking and all this DNS thing. I have the following questions What is an Authoritative Nameserver ? What is a Recursive Resolver ? Please help/ guide me out on this. I have read Authoritative Nameserver, but I was not able to…
Yasser Shaikh
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Clarification of why DNS zone files require NS records

This question was originally asked here: Why do DNS zone files require NS records? To summarise: "When I go to my registrar and purchase example.com , I will tell my registrar that my nameservers are ns1.example.org and ns2.example.org". But please…
Lars
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Difference between Named and BIND

Can someone explain to me what the exact difference is between named and BIND?
Saif Bechan
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How is it possible for the Root Name Servers to handle all DNS requests?

I was reading about DNS some days ago and learned how the requests are processed. If you surf to www.example.com, then a request will go to the Root Name Servers to see who owns that .com address, then another request will go to another, more local,…
Rox
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djbdns vs bind

I'm a newbie who wants to learn how to set up a DNS nameserver. Should I use djbdns, BIND, or something else? Current network requirements include subdomain support, SSL, and mail service, all on very light traffic. I'd like a solution that could…
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Finding all domains registered in a nameserver

Up until now, I was pretty confident that it was pretty much impossible to list all the domains handled by a nameserver. But apparently, there exists a couple of websites on the Internet that are able to list all the domains registered in a…
Florian
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What are the benefits of a high TTL for DNS?

I'm moving a domain's nameservers from the registrar to dnsmadeasy.com so that we can have automatic failover (among other benefits). When I've done this in the past I simply set the TTL value as low as it can go (1 minute) for the A record so that…
Charlie Schliesser
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