Linked Questions

-4
votes
1answer
370 views

How to configure Separate Domain registrar, Web host and Email host settings? [duplicate]

Let's say we have a domain example.com Domain registrar : NAME.COM Web Host : IPAGE.COM Email Host : GMAIL (Google Apps) My understanding is that: I should add MX records to use Gmail (clear) I ...
1
vote
0answers
40 views

How works the NS record definition in DNS section at CloudFlare? [duplicate]

In domain configuration at CloudFlare, the DNS section stores the record definitions. What is the exact purpose of NS record here? If configured, it shows something like: Type | Name | Value ...
2
votes
0answers
36 views

Role of Authoritative NS record in bind9 compared with Non-Authoritative NS record in Registrar [duplicate]

Whenever we register a new domain name from a Registrar, we need to tell them what is the nameserver by providing them the dns server IP address. But in the same time in the zone file of our dns ...
151
votes
4answers
97k views

What is a glue record?

This is a Canonical Question about DNS glue records. What exactly (but briefly) is a DNS glue record? Why are they needed and how do they work?
42
votes
7answers
67k views

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 ...
25
votes
2answers
9k views

Some DNS servers in the world giving wrong IP address for our domain?

Our domain, grahamhancock.com is being wrongly resolved by a few people around the world, but it resolves correctly for most people. When I run through a list of free open DNS providers, about 90% ...
29
votes
3answers
17k views

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 ...
7
votes
3answers
8k views

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 ...
4
votes
3answers
4k views

Is there any way to tell the TTL on root name server DNS records?

I am currently migrating a DNS zone from one DNS server provider to another. I am trying to estimate how long it will take for the change to propagate, and to understand what the delay might be if I ...
5
votes
2answers
2k views

DNS subdomain (child) NS records

this is my first post here, so excuse me if I don't post everything quite right. anyway, my question is about zone files in parent and child zones. if we have example.com we would setup things ...
0
votes
3answers
1k views

Why do name servers occur in whois as well as DNS?

I am trying to understand why the name servers for a domain occurs in both whois information and DNS information. For example, the following whois output shows that ns1.google.com, ns2.google.com, ...
-3
votes
1answer
1k views

DNS lookup takes 10 plus seconds [closed]

DNS lookup of www.duckdns.org takes 10 plus seconds. Is this my internet provider's DNS issue? Here is the output of host command using my provider DNS and Google DNS: $ time host www.duckdns.org ...
1
vote
1answer
953 views

Correctly calculate DNS TTL from host -a output

I'm trying to figure out how TTLs are handled in DNS (in the end I'm trying to figure out the fastest way to switch over a domain), but somehow I'm stuck in interpreting TTL values. For example I ...
1
vote
2answers
391 views

How to delegate NS for the apex?

We have a registered domain (example2.com) that has the company's name servers registered against it (ns1.example.com, ns2.example.com) at the registrar. We would like to "delegate" the DNS ...
1
vote
0answers
1k views

Registrar nameservers vs. NS records for bare domain?

OK, I'm a bit new to DNS, but I'm having some trouble finding the answer to this. I have a domain registered at google domains. As with other registrars, you have access to their free DNS, and ...
1
vote
1answer
221 views

When are NS records at the apex of a DNS domain queried?

Let's say, that I have a following example.com zone: $TTL 120 @ IN SOA ns1 hostmaster (2018041509 300 ...
3
votes
0answers
948 views

Why does dig +trace seem to ignore the DNS glue records?

Here are my questions: Why does dig +trace ignore the Glue Records? Is this behavior specific to dig or dig +trace, or does a recursive name server also "manually verify" glue records it receives? ...
0
votes
1answer
208 views

Nameservers chaining

I pointed my domain nameservers (in the regristrar) to a DNS provider (Cloudflare). Then I created two NS records pointing to my hoster nameserver. Registrar -> DNS provider -> hoster. But it doesn't ...