Questions tagged [nameserver]
A name server is a computer server that hosts a network service for providing responses to queries against a directory service.
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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 ...
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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 ...
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votes
8
answers
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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 ...
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votes
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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 ...
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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 ...
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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 ...
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votes
4
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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 ...
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27
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Best Practices in Speeding-up DNS Propagation [duplicate]
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 ...
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25
votes
3
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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 ...
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votes
3
answers
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Difference between Named and BIND
Can someone explain to me what the exact difference is between named and BIND?
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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 ...
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votes
5
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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, ...
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20
votes
11
answers
9k
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djbdns vs bind [closed]
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 ...
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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 ...
18
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3
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how to forward dns alias to hostname:port? [duplicate]
Possible Duplicate:
How to use DNS to redirect domain to specific port on my server
My web application is running on myserver.mydomain:10000
I would like to make it available on the intranet as ...
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18
votes
8
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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 ...
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CDN: How is it possible that my DNS delivers a different IP depending on the visitors location?
I found this explanation how a CDN works. But there is one thing I don't really understand. Let's assume I setup multiple DNS servers at my location and they use the nameserver domains dns1.example....
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4
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Will changing NameServers cause down time?
My domain registrar is Company A and we use two of their nameservers for DNS. We host our own server hardware in a datacenter that's not affiliated with Company A. Everything about Company A sucks. So ...
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1
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What happens when I change a Name Server record or an A record in the Zone file or the DNS settings?
I don't really understand how the internet and DNS works. I am inundated with terms I don't understand when trying to read about it on wikipedia. I don't have a computer science background.
When ...
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Configure a DNS server per nic interface (eth0 / eth1)?
How would you configure a DNS Name Server per NIC (eth0 vs eth1) interface on RHEL/Centos 6?
E.g.
eth0 is on subnet 10.0.0.1/24
eth1 is on subnet 192.168.0.1/24
Any requests sent over eth0 should use ...
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12
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1
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What does #53 mean in nslookup nameserver address result?
When I run this:
nslookup some.host.com
I get results like this:
Server: 4.2.2.1
Address: 4.2.2.1#53
Non-authoritative answer:
Name: some.host.com
Address: #.#.#.#
"4.2.2.1" is ...
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Two name servers necessary?
I want to use my internet connection to host two personal websites (two different domains). I would also like to host mail for these domains.
This requires hosting my own name server. In the ...
Mike
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2
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order of nameservers in resolv.conf
In which oder are the nameservers stated in resolv.conf used for name resolution?
Is there a way to influence this order?
Is this behavior distribution dependent? (I'm using Debian Squeeze)
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Check remaining TTL for nameserver
Is it possible to check how much time is left before a nameserver like 8.8.8.8 will update its records from my nameserver?
11
votes
1
answer
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Can the value for a NS record be an IP address?
Until today I was used to believe it couldn't.
From this page
The name field can be any of:
A Fully Qualified Domain Name (FQDN) e.g. example.com. (ends with a
dot)
An unqualfied name (...
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DNS servfail at some of Nameservers [closed]
I make tiny little Nameserver for my own just for fun.
Currently it serves *.iwanhae.ga sites. likes http://blog.iwanhae.ga
but the problem is some of nameservers can not get ip address of blog....
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votes
2
answers
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hetzner default nameservers not always resolving
I have couple of Hetzner 'root servers' (as they call it - dedicated co-located linux machines) and all of them experience the same problem (which i simply do not fully understand).
The domain www....
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3
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Who does the nameserver 4.2.2.2 belong to?
Does someone know who is the owner of the Nameserver 4.2.2.2 ? I find a whois but I dont know the organisation.. Does someone know it ?
Has someone searched before?
Thanks for your help!
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What is the correct behaviour when Nameservers Change
I have been having some issues with a certain network supplier over unchanged nameservers making my site invisible to their customers. I wouldnt be bothered except that they are one of the largest ...
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4
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setting up bind to work with nsupdate (SERVFAIL)
I'm trying to update my DNS-Server dynamically using nsupdate.
Prerequisite
I'm using Debian 6 on my DNS-Server and Debian 4 on my client.
I created a public/private key pair using:
dnssec-keygen -...
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9
votes
4
answers
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Redirect subdomain.example.org to somethingelse.com hidden to the user?
I'm not knowledgeable at all about C-NAMES, A-RECORDS, name servers and the like, so just bear with me on this one:
I want to redirect subdomain.example.org to another domain somethingelse.com. I do ...
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9
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2
answers
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Missing nameservers reported by parent and your nameservers
I've been going at this for a few days now and neither previous hosting company nor current one seem to be able to help me sort this out. I am migrating an opencart-based online shop between two ...
8
votes
3
answers
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DNS root record hardcoded then why it has ttl?
I host a recursive name server locally so I don't need my service provider or another public DNS server for name resolution. Although the root name server IP-addresses are hardcoded in the config file ...
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2
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What is the difference between search domains and nameservers? [closed]
I've usually seen two kinds of entries in /etc/resolv.conf on certain servers. The domain-name-servers entry specifies which DNS to use for resolving hostnames to IP addresses. Recently I saw an entry ...
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votes
8
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DNS performance: Does having multiple secondary NS servers improve performance?
When some domain have primary NS, and several secondary NSes, will clients ask them randomly to reduce the load, or they will hit primary NS only, and proceed to secondary only when primary fails?
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1
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AWS Route 53 CNAME - dot at end of target value or not?
My hosted zone at AWS seem to be working fine so I am a little nervous about changing it -- but I noticed that my CNAME record for my white-label DNS looks like this right now (no trailing dot):
*....
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votes
2
answers
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Do I need to renew the keys which I deposited at my domain provider?
I have set up some domains with dnssec. I generated the keys and signed the zones with zonesigner from dnssec-tools. I know that I must resign the zones within 30 days. But what's up with the keys ...
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votes
3
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BIND permission errors
I've been trying to use nsupdate to dynamiclly update my nameservers records.
I get a serverfail when i attempt it. This is from the syslogs.
Nov 12 08:00:53 ps133045 named[14314]: client 78.72.53....
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Importance of PTR records on nameserver IP's?
I have not yet experienced any DNS failures due to a missing PTR record, but am wondering:
Is there any added value in having a valid PTR record on a nameserver IP-address?
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How should I setup DNS when all I have is a VPS with a static IP? [closed]
I have a VPS with a static IP and a domain pointed to the registrants nameservers, so I can change all of the DNS records.
In past, I've always just set nameservers to my VPS/hosting provider, but I ...
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Root, Local and Authoritative name server?
I've tried to read in Wikipedia about the key features of Root, Local and Authoritative name servers... But I have a problem understanding what each type of dns server does.
Can someone please give me ...
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How to determine which DNS server has the authority to set rDNS (PTR records)?
or to re-phrase... How to determine to whom authority has been delegated to set rDNS?
Background
In a multi-tier environment, where a block of IP's is assigned, then further split and assigned (...
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Does a single Root Name Server and a TLD Name Server have only one Zone file? [closed]
Is it correct to say a single Root Name Server and a TLD Name Server will have only a single Zone file inside them? and this single Zone file (within Root Name Server and a TLD Name Server) will only ...
7
votes
1
answer
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BIND - increase in outgoing NS queries after upgrade to CentOS 6.7?
After upgrading BIND to 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.2 in a few caching nameservers I've noticed it's doing lots of outgoing NS queries, without changes to incoming traffic volume or patterns.
...
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8
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why are there several nameservers for my domain?
Like I have for my domain:
ns1.somedomain.com
IP: 122.some.ip.here
ns2.somedomain.com
IP: 122.some.ip.here
Why there are 2 or more of them? The hosting is just one server and if that falls ...
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votes
6
answers
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Why is my domain still going to the wrong server?
I have a domain for which I updated the nameservers to point to my new server not long (~ 1 hour) ago:
The WHOIS report tells me it's been updated:
http://www.dnsstuff.com/tools/whois/?ip=ablazex.com&...
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What has priority: nameservers or a records?
If I have a domain name with nameservers pointing to Webhost One, but have an A Record that points to Webhost Two, which host would the domain name bring me to?
I'm pretty sure the A Record takes ...
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votes
2
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Setting MX records with Registrar vs. Nameserver Host
I'm a bit confused about what has happened with one of my client's email accounts.
My client registered a domain at dotster.com. She wanted to start using email for that domain before we had her ...
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2
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Tool to check DNS records from multiple nameservers? [closed]
Is there a desktop or online tool that will query multiple name servers (dozens ideally) to get an idea if and how a DNS record change is propagating?
I know of many free tools, but they only check ...
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How are name server requests ordered?
Say I have a domain name registered with a website. On their site it says the following:
Domain Name Servers listed in order:
ns9.zoneedit.com
ns18.zoneedit.com
ns3.freedns.ws
Are name servers ...
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