Re: [cobalt-users] Sub Domains and wildcard entrys

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

Andrew wrote:

> I am new to all this - I have a RAQ3 and would like to do the following but
> dont know how ??
> 
> your base domain name is onlinearts.net, you'd create a wildcard entry of
> *.onlinearts.net in your DNS settings.
> 
> When this occurs, any subdomain host name (test.onlinearts.net
> foobar.onlinearts.net, etc) will be recognized as the equivalent of the root
> domain.

The RaQ doesn't do it because doing it is fraught with danger.

For example, you've got systems at:

mail.domain.com
manny.domain.com
moe.domain.com
jack.domain.com

So you've got an A record for *.domain.com.

Then you set up an MX record so people at moe.domain.com get email at
mail.domain.com.

Now moe.domain.com no longer resolves.  (All carefully documented in the
O'Reilly book "DNS & Bind".)

Since there's no way to easily have the RaQ check for this sort of
problem each time you add or subtract a record from a zone-file, the RaQ
(like most system administrators I know) just don't allow it.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
nobaloney.net
P. O. Box 52672
Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205