I want to know how is this done. I make a site at weebly, ( it’s a sitebuilder).
I get a site xxx.weebly.com
If I want my custom domain name, I set A record of custom domain name to point to server : 199.34.228.100
Question is, how that default application(on 199.34.228.100) works which takes my domain name and show the content of the site to me?
Suppose your custom domain name is ‘mysite.com’. At weebly, you set the A record to 199.34.228.100 which is like saying ‘when someone wants to access ‘mysite.com’ I want them to be sent to 199.34.228.100.
This information is given to all the dns servers around the internet over the next few hours but can sometimes take longer. Afterwards, whenever a request is sent out for ‘mysite.com’ it will be mapped to 199.34.228.100.
This is weebly.com and when the request arrives, it will come with information saying that the original request was for ‘mysite.com’. Weebly then looks in it’s records to see who wanted that to happen, see that you made the change and knowing that you have xxx.weebly.com, show that site.
I hope that helps