[CentOS] DNS in CentOS
Les Mikesell
lesmikesell at gmail.com
Tue Apr 1 22:57:02 UTC 2008
vincenzo romero wrote:
> thanks for the response!
>
> On Tue, Apr 1, 2008 at 3:09 PM, Les Mikesell <lesmikesell at gmail.com> wrote:
>
>> Is this supposed to have something to do with either company.com or
>> lab.company.com? It doesn't. And is there some reason you only want
>> the forwarder to only handle one zone?
>>
>
> my bad a typo .. it is :
>
> zone "company.com." IN {
> type forward;
> forwarders { 10.100.1.24 port 53;
> };
>
> ...
>
> I want any other queries that lab.company.com is not authoritative
> for, to go to the Name Server of company.com.
That happens anyway if the forwarder is not authoritative - that is, the
forwarder will act as a caching proxy.
> ...
>
> I did try now to edit a test machine so that its resolv.conf file shows:
>
> search lab.company.com company.com
> nameserver 192.168.17.2
> nameserver 10.100.1.24
>
> 1. I can ping, and do host <hostname> and ip address
> 2. nslookup <hostname> resolves ..
> 3. but nslookup IPaddress returns with a listing of ROOT servers:
>
> nslookup 10.100.1.24
> Server: 192.168.17.2
> Address: 192.168.17.2#53
>
> Non-authoritative answer:
> 24.1.100.10.in-addr.arpa name = ns.company.com.
Does this zone file have an NS record for the server that answers?
>
> Authoritative answers can be found from:
> . nameserver = l.root-servers.net.
> . nameserver = m.root-servers.net.
> . nameserver = a.root-servers.net.
> . nameserver = b.root-servers.net.
> . nameserver = c.root-servers.net.
> . nameserver = d.root-servers.net.
> . nameserver = e.root-servers.net.
> . nameserver = f.root-servers.net.
> . nameserver = g.root-servers.net.
> . nameserver = h.root-servers.net.
> . nameserver = i.root-servers.net.
> . nameserver = j.root-servers.net.
> . nameserver = k.root-servers.net.
It's not really polite to send private IP reverse lookups to the public
root servers, but I suppose millions of places do...
--
Les Mikesell
lesmikesell at gmail.com
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