named.cong in RHE AS4 .

[Peter Dambier]

hamideh d wrote:
> hi,
> would someone explain about localdomain and localhost
> in named.conf file on RH enterprise AS4 ?
> 
> 
> zone "localdomain" IN {
>         type master;
>         file "localdomain.zone";
>         allow-update { none; };
> };

That is the famous 'local' domain of zero configuration, rendezvous,
bojour, 169.254.xxx.xxx

I dont know if this is a good idea to define it. I have seen windows
break because of this. At least it keeps those requests off the net
and that is good.

> 
> zone "localhost" IN {
>         type master;
>         file "localhost.zone";
>         allow-update { none; };
> };
> 
> and another question... I saw these lines in
> named.conf

That is 127.0.0.1

Define it here too keep those requests from polluting the root-servers

> 
> zone
> "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa"
> IN {
>         type master;
>         file "named.ip6.local";
>         allow-update { none; };
> };
> 
> does it mean it support IPV6 ?
> 

Yes.

This is the IPv6 equivalent of 127.0.0.1 localhost.
Requests for this domain should never be seen in the internet. To keep it
local it is defined here,

> tnx .

All these domains are local and dont may be seen in the internet.

Nevertheless 90% of the rootserver-traffic is for these domains.


Regards,
Peter and Karin Dambier

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