[CentOS] Slow domain resolution problem

[Keith Roberts]

On Wed, 25 Aug 2010, Gabriel Tabares wrote:

> To: centos at centos.org
> From: Gabriel Tabares <gabriel.tabares at roboreus.com>
> Subject: Re: [CentOS] Slow domain resolution problem
> 
> On 23/08/2010 21:25, Keith Roberts wrote:
>> On Mon, 23 Aug 2010, Gabriel Tabares wrote:
>>
>>
>>> To: centos at centos.org
>>> From: Gabriel Tabares<gabriel.tabares at roboreus.com>
>>> Subject: Re: [CentOS] Slow domain resolution problem
>>>
>>> On 23/08/2010 13:28, Joseph L. Casale wrote:
>>>
>>>>> Both files are the default ones from CentOS:
>>>>>
>>>>>
>>>> So what do the host names look like that the application
>>>> attempts to resolve, fully qualified or not? What does your
>>>> cli based query look like?
>>>>
>>>>
>>>>
>>> My resolv.conf is:
>>>
>>> search mydomain.com
>>> nameserver 10.3.2.2
>>>
>>> The hostname of the machines is set to a FQDN server.mydomain.com.
>>>
>>> The time it takes for the queries does not change whether we use the
>>> FQDN or just the hostname.
>>>
>> Try this in your /etc/reolv.conf
>>
>> # Eclipse ISP
>> nameserver 212.104.130.9
>> nameserver 212.104.130.65
>>
>> # OpenDNS
>> nameserver 208.67.222.222
>> nameserver 208.67.220.220
>>
>>
> Keith, the issue happens resolving internal IP addresses. The servers do
> not have DNS access to the outside world, so using this would mean that
> nothing is resolved ;)

OK. IIRC did I see a domain name listed in your resolv.conf 
file? If so, would this not cause some sort of 
chicken-and-egg problem - ie what comes first?

Personally I stick with static IP addresses in my 
resolv.conf, like listed about.

Depending on how many machines you have on your LAN, would 
it be feasable to hard-code the domain -> IP addresses for 
those machines directly into the /etc/hosts file? That way 
you would not need any DNS on your LAN.

Kind Regards,

Keith Roberts

-----------------------------------------------------------------
Websites:
http://www.php-debuggers.net
http://www.karsites.net
http://www.raised-from-the-dead.org.uk

All email addresses are challenge-response protected with
TMDA [http://tmda.net]
-----------------------------------------------------------------