Virtual Hosting DNS Question

[Chong Yu Meng]

Thanks a lot, Jay !

That clarified things considerably!

Regards,
pascal chong



Jay Nugent wrote:

>Greetings,
>
>On Mon, 23 Feb 2004, Chong Yu Meng wrote:
>
>  
>
>>Hi All,
>>
>>I need to install and configure a server for virtual hosting. Because of 
>>a shortage of IP addresses, I need to use name-based virtual hosting. 
>>Now, for Apache, this is easily done, but I don't know how to add the 
>>records for the DNS. My scenario is as follows:
>>
>>The server will have 3 virtual hosts sharing 1 IP address:
>>
>>demo.xyzdomain.com
>>apps.xyzdomain.com
>>www.xyzdomain.com
>>
>>What entries must I make into the DNS ? I understand that you can use 
>>CNAME, but that practice is discouraged -- I don't know why, though.
>>    
>>
>
>   Put simply, you cannot use a CNAME to define your MX host or NS
>servers.  Other than that, CNAMES are fine to use elsewhere.
>
>
>demo.xyzdomain.com     IN   A       xxx.yyy.zzz.hhh
>apps.xyzdomain.com     IN   CNAME   demo.xyzdomain.com.
>www.xyzdomain.com      IN   CNAME   demo.xyzdomain.com.
>
>   --- or ---
>
>demo.xyzdomain.com     IN   A       xxx.yyy.zzz.hhh
>apps.xyzdomain.com     IN   CNAME   xxx.yyy.zzz.hhh
>www.xyzdomain.com      IN   CNAME   xxx.yyy.zzz.hhh
>
>   Yes.  It is absolutely okay to point many hosts to the *same* IP 
>address.
>
>   Enjoy!
>      --- Jay
>
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