Problem with name resolving

[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 dyndns.org 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 dyndns.org with the same IP?
>
> regards Markus
>

I don't know dyndns.com services that well.  I don't know what they 
support or do not support directly.

Using an example, I have lcrcomputer.com.  If I setup a dynamic dns host 
with dyndns.org and wanted two host names pointing there, I would do this:

1) setup a dynamic host at dyndns:  host.dyndns.org

2) in the LCRCOMPUTER.COM zone I would add two entries:

host1.lcrcomputer.com. in cname host.dyndns.org.
host2.lcrcomputer.com. in cname host.dyndns.org.


I don't know if dyndns.com will allow you to create cname entries in 
their zones.  They will if you have a hosted domain name there.

You need to open udp and tcp port 53 only if you need to make your dns 
server available to the public Internet.  If it's only for internal use, 
no.  And besides, if you want to run a public name server, it needs to 
be on a static IP address and not on a dynamic ip address.

Lyle Giese
LCR Computer Services, Inc.