What does adding a subdomain for a webhosting package do?

resetreset · 01-22-2012, 07:12 AM

Hi,
If I have bought a domain, poo.com where I have put up a website, what needs to be done to add a bar.poo.com subdomain, whose site I want to upload in a particular directory, say poo.com/testdir/ ?

I don't want a DNS or BIND tut, I'm more interested in the theory - what actually HAPPENS, and then I can get to those tuts in my own time.

Thx.

acid_kewpie · 01-22-2012, 10:27 AM

Not sure what you mean by what happens... a new DNS entry exists, so that domain resolves to an IP. For a web server, the HTTP Host header contains the new domain and the web server generally uses that to apply a different set of config, a VirtualHost in Apache, including a different documentroot. There is no black magic, no concept of a sub domain relative to a parent domain, just different names which get used in different ways according to your configuration.

Nothing to do with Networking. Moved to Linux - Server.

TenTenths · 01-23-2012, 05:38 AM

Taking DNS in full, poo.com is really poo.com. and is actually a subdomain of com. which is delegated from .

By convention the trailing . is usually ignored though and people are much more used to thinking of the main domain extensions as "top level"