Re: [CentOS] How to set the hostname alias in DNS server

On 04/06/11 6:43 PM, sync wrote:

On Thu, Apr 7, 2011 at 9:33 AM, Les Mikesell <lesmikesell@gmail.com mailto:lesmikesell@gmail.com> wrote:

On 4/6/11 8:18 PM, sync wrote:
> Hi ,all:
>
>
> There has a problem which confused me for a long time . The
problem is the
> following:
>
> Would I can set the hostname alias in DNS server?
>
> That's to say,  for example , if  my hostname is called server,
 that it's ip
> address is 127.0.0.1
> and I want to alias another name called aaa

First, 127.0.0.1 is a special case that always refers to the same
host where the
connection originates, so you can't really use that from another
machine
regardless of how you resolve the name.

> Gernerally, I can edit the /etc/hosts file to modify it, but the
another
> computer did not recognise it.
> How could I do it ?

That is up to your DNS server type.  If it is BIND/named you'll
have a zone file
for each domain it is serving with an 'A' record entry for a name
and IP, and
you would add CNAME entries for aliases or additional names.

Like this ?

Add the following line in localdomain zone file :

localdomain should ONLY have `localhost` as 127.0.0.1

'server' should be a name in another domain, and it shoudl have your host's actual IP(s).

" server IN A 127.0.0.1 aaa IN CNAME server "

then reload the named service .

when you modify a zonefile, you need to increment the serial field on the SOA record.

I recommend the O'Reilly book "DNS/BIND" be read thoroughly and all concepts fully understood before messing with DNS, especially on a zone authoritative server.