If I host my website on Digitalocean and purchase my domain from namecheap.com, I have to edit the Nameservers linked to my domain (www.example.com) in my namecheap.com profile with ns1.digitalocean.com, ns2.digialocean.com, ns3.digitalocean.com.
Does that mean when the Recursive DNS server queries for the IP address from the Authoritative nameserver (namecheap.com servers), the namecheap.com servers will act as a recursive DNS server and redirect the query towards Digitalocean?
namecheap.com is a Domain Name registrant. It provides default name server for the domains bought from namecheap.com.
If you change the nameservers on domain name registrant, the DNS query from recursive nameserver will directly query the nameservers on digital oceans. There is no namecheap.com to digitalocean.com DNS query.
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I have a domain and the host (Education Host) require to change the nameserver of that domain to its nameservers but the host doesn't have a DNS zone so I want to manage DNS with CloudFlare but its require to change nameservers too. So I want to use both of them but I don't know what happens?
Nothing happens, enter to your Cloudflare panel, change your domains DNS to Cloudflare DNS and in the IP section; Insert IP of your hosts (Education Host).
This will connect your domain to the host, and you can also manage domain records in Cloudfler.
reading this article will help you.
I have a domain and i want to set it to my server(centos 7).
I made a dns server by bind on my server and made 2 nameserver (ns1.myDomain.ir and ns1.myDomain.ir) and set it in my domain configuration, But i cant ping to my domain.
What is the problem?
At the domain registrar, you need to specify the authorised DNS server for your domain. My suggestion is to use the domain registrar's DNS server for resolution and create a zone file there for your domain and enter the A records and other records for your use case.
To have a domain working you don't need to setup your on DNS (bind) server.
I bought a domain from Google Domains. I have an A record (on Google Domains DNS control panel) pointed to my server's IP. I had a www CNAME record pointed to mydomain.tld. To experiment with my hosting panel's DNS (I have VestaCP) I deleted the www record from Google Domains DNS panel. There was already a www A record on VestaCP DNS panel. I deleted that and added a www CNAME record pointing to mydomain.tld. And suddenly my www.mydomain.tld stopped resolving. I also tried adding a test A record but I couldn't ping `test.mydomain.tld'.
So, how does hosting panel's DNS work? Each time I add a new website (be it a sub domain or a new domain itself) VestaCP creates certain DNS records. Are these DNS records supposed to override the ones in domain registrar's DNS panel or vice versa? What are DNS records in VestaCP DNS are there for?
When you have your hosting and domain in one single server or with one provider, your domain DNS will be with your domain itself. You just need to point the A record to hosting IP. Your Nameservers will be the default.
If you have your domain with one hosting provider and domain with other then you need to change your domain Nameservers to hosting nameservers. Then your DNS will migrate to your hosting account. The changes you may do in your domain panel will not affect. You can change your DNS settings from your hosting account only.
Hope it helps.
What I understand about how DNS works is like this: first let's assume mydomain.com has the IP address 12.34.56.78. Now when I put the url mydomain.com in the browser, the browser sends a dns lookup to its local dns server, asking, hey, do you know the ip address for mydomain.com. If the local dns server does not know about it, it will ask the parent dns servers, if the parent also does not know, then it keeps asking all the way up until the root dns server. The root dns server will ask some server in charge of the .com tld. The dns server in charge of the .com will have knowledge about mydomain.com because mydomain.com is the .com family. Then the answer will be returned back to the initial asker. Also the answer quite likely will be cached in the dns servers involved in the asking process. Would anyone correct my understanding if it is wrong.
So my real question is about how reverse dns lookup works. Let's say if I want to find out what domain name is for the ip 12.34.56.78. I run the command dig -x 12.34.56.78. If my local dns server does not know the answer, which server does it further ask? Is it 12.in-addr.arpa., or 34.12.in-addr.arpa.? If this is the case, are these names like 12.in-addr.arpa. valid domain names? And where should they be deployed so that the reverse lookup requests will know whom to ask?
How a reverse DNS lookup is accomplished:
The DNS resolver reverses the IP, and adds it to ".in-addr.arpa" (or ".ip6.arpa" for IPv6 lookups), turning 192.0.2.25 into 25.2.0.192.in-addr.arpa.
The DNS resolver then looks up the PTR record for 25.2.0.192.in-addr.arpa.
The DNS resolver asks the root servers for the PTR record for 25.2.0.192.in-addr.arpa.
The root servers refer the DNS resolver to the DNS servers in charge of the Class A range (192.in-addr.arpa, which covers all IPs that begin with 192).
In almost all cases, the root servers will refer the DNS resolver to a "RIR" ("Regional Internet Registry"). These are the organizations that allocate IPs. In general, ARIN handles North American IPs, APNIC handles Asian-Pacific IPs, and RIPE handles European IPs.
The DNS resolver will ask the ARIN DNS servers for the PTR record for 25.2.0.192.in-addr.arpa.
The ARIN DNS servers will refer the DNS resolver to the DNS servers of the organization that was originally given the IP range. These are usually the DNS servers of your ISP, or their bandwidth provider.
The DNS resolver will ask the ISP's DNS servers for the PTR record for 25.2.0.192.in-addr.arpa.
The ISP's DNS servers will refer the DNS resolver to the organization's DNS servers.
The DNS resolver will ask the organization's DNS servers for the PTR record for 25.2.0.192.in-addr.arpa.
The organization's DNS servers will respond with "host.example.com".
Source here.
I have a domain xyz.com whose registrar and web host are different. I have pointed the registrars name server entries to the web hosts ns01.host.com, etc.
On the web host, I have now created sub.xyz.com and want to delegate this domain to an external name server. Of course this is not possible straight off since the web host only allows IP Addresses against Custom A records.
What are my options to delegate sub.xyz.com to ns01.externalnameserver.com?
Instead of an A record on your registrar, you may use CNAME record to point the subdomain to an external address.