Problem with name resolving

Lyle Giese lyle at
Sat Jul 2 12:28:49 UTC 2011

On 07/02/11 04:37, Markus Feldmann wrote:
> Am 01.07.2011 22:43, schrieb Lyle Giese:
>> On 07/01/11 14:13, Markus Feldmann wrote:
>>> Am 01.07.2011 18:35, schrieb Lyle Giese:
>>>> You are right in that you only need one host at to update
>>>> your ip address, but you want to have two different websites. The
>>>> proper
>>>> way to do that is with CNAME entries pointing to the host you are
>>>> updating at connect time.
>>> Do i need to open my firewall for port 53? :-( Is there another way?
>>> maybe to add two virtual hosts at with the same IP?
>>> regards Markus
>> I don't know services that well. I don't know what they
>> support or do not support directly.
>> Using an example, I have If I setup a dynamic dns host
>> with and wanted two host names pointing there, I would do
>> this:
>> 1) setup a dynamic host at dyndns:
>> 2) in the LCRCOMPUTER.COM zone I would add two entries:
>> in cname
>> in cname
> In which zone file? "db.feldland.lan" or in "db.192.168.0" ? or in both?

db.192.168.0 is for reverse lookups.  Mapping ip addresses to a host 
name.  192.168.0.x is part of RFC1918 reserved ip addresses and should 
never be exposed to the Internet.

db.feldland.lan is a private internal to your lan domain that is not 
registered anywhere and therefore nobody out on the Internet should be 
looking for hosts there.

In my example, LCRCOMPUTER.COM is a legal and registered domain name on 
the Internet.

> And would it be possible to only allow the DNS-Server at and
> my provider to contact my bind9 server and not to the rest of the world?
> Or does it make no sense for name resolving?

We have not established a sane question for them to ask of your name server.

Lyle Giese
LCR Computer Services, Inc.

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