问题
say you have a domain (mydomain.com) in registered to a registrar, say namecheap,
you have setup MX record to handle email sent to your domain
you had setup an A record to make a subdomain use a different webhost
Name: intranet.mydomain.com
Value: 108.xxx.xxx.xx
Type: A name
now, you want to host the primary domain to a webhost, so that when a user load mydomain.com to their browser it will use webhost to load the resources
Question, the webhost requires you to update domain nameserver to use
ns1.myhost.com
ns2.myhost.com
Will updating my nameserver to my domain registrar to use the nameservers above will void/not-implement the already existing A records?
If not, how do you solve the problem? Thanks!
回答1:
In somewhat laymen's terms:
You need to distinguish between 3 different (yet related) services:
- Domain name registration - you pay for your domain name here. Except for the name itself, here you need to enter your Domain Name server names, which will point to where the next service is hosted:
- DNS service - here is where you enter all your records (A, MX, ...) which point to your other services (web hosting, mail servers, etc..)
- Service hosting provider (for example web hosting, or email service)
You can have different parties host these services for you, but it is not uncommon that one service provider can offer all these services. From your description, it looks like that at the moment your Name registrar (1) is also hosting your DNS service (2) (which is quite common). Now, your new web hosting provider wants to host your DNS service, and is requiring that at your name registrar, you enter its name server names (which is also not uncommon). And you are right, if you do that, any DNS records that you entered at your current DNS provider will be void (they will remain there, but no end user will ever see them since (1) will point them to use your new hosting provider's name service to resolve your domain records).
You have two options:
- Do not comply with your webhost's request, instead ask them what DNS records (probably A or CNAME) you need to add at your current DNS service provider in order that your new website becomes reachable.
- Comply with your webhost's request, but then you will have to go to your new provider's name service console and again add all the records that you already have entered at your previous DNS provider.
I would choose option 1, as less risky
来源：https://stackoverflow.com/questions/45475549/if-you-change-your-domain-nameservers-does-that-void-all-dns-mx-a-record-you-inp