Possible to redirect to custom "A" record all domains that do not have a DNS Zone?

[Kevin Darcy]

intel69 at gmail.com wrote:
> - Is this possible using Named/bind?
>
> - Is this possible to implement in our DNS cluster? ( basically we
> upload the zone files and modify named.conf everytime a new account is
> modified)
>
>   
This is possible in a closed DNS environment using wildcards. You'd need 
to put the wildcards at each level of domain that you care about, e.g. 
if you want all ".com" names to match this "fall-through" wildcard, then 
the wildcard entry needs to put in "com". If you want to match one level 
down, you'd need wildcards at that level too, e.g. a *.example.com 
wildcard to match customer1.example.com. Repeat for every level you care 
about, including the root level if you want to catch bogus TLDs, e.g. 
www.notreally.

Obviously this approach is not compatible with an "open" DNS environment 
where you're resolving Internet names, since you don't have control of 
other people's zones and can't "superimpose" a wildcard entry on someone 
else's data.

                                                                         
                              - Kevin