[Cialug] DNS Issues

Stuart Thiessen sthiessen at passitonservices.org
Tue Aug 23 18:10:04 CDT 2005


It looks like this with appropriate dummy values.  The firewall only 
has the nameserver entries but not the domain entry in its resolv.conf.

domain mydomain.com
nameserver 207.xxx.xxx.xxx
nameserver 204.xxx.xxx.xxx

Thanks,

Stuart

On Aug 23, 2005, at 17:59, David Champion wrote:

> What does your /etc/resolv.conf look like?
>
> -dc
>
> Stuart Thiessen wrote:
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>> Turned off nscd and really nothing changed much (except it seems to 
>> read /etc/hosts faster). It doesn't make sense that it is the 
>> firewall on the email server or the firewall for our network.
>> Hmmm ..... ANy other ideas?
>> Stuart
>> On Aug 23, 2005, at 17:16, Stuart Thiessen wrote:
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>>> I ran route -n  and it shows that it is pointing to the firewall as 
>>> the gateway.
>>>
>>> nscd has been running all along.  I hadn't encountered that program 
>>> before so I just left it running.  I know enough to be dangerous but 
>>> not enough to be an expert yet.  :)
>>>
>>> Hmmm .... I can stop nscd and see if that does anything.  route 
>>> seems good.  I'm not sure what the problem can be.  I'd suspect our 
>>> firewall, but no other computer on the network is having problems.  
>>> So ... Hmmm.
>>>
>>> Thanks,
>>>
>>> Stuart
>>>
>>> On Aug 23, 2005, at 17:02, Paul Gray wrote:
>>>
>>>> On Tue, Aug 23, 2005 at 04:48:34PM -0500, David Champion wrote:
>>>>
>>>>> Are you sure it's not a problem with ncsd? The Debian package info 
>>>>> for
>>>>> that says:
>>>>>
>>>>> "A daemon which handles passwd, group and host lookups for running
>>>>> programs and caches the results for the next query. You should 
>>>>> install
>>>>> this package only if you use slow Services like LDAP, NIS or NIS+"
>>>>>
>>>>
>>>> If nscd is running, you can stop it with "/etc/init.d/nscd stop"
>>>> or invalidate the hosts with nscd -i hosts
>>>>
>>>> But, it sounds like the root of your problem isn't resolv.conf, but 
>>>> rather the
>>>> default route.
>>>>
>>>> What does "route -n" show?  does it point to the firewall as the 
>>>> default
>>>> gateway?
>>>>
>>>> -- 
>>>> Paul Gray                                         -o)
>>>> 323 Wright Hall                                   /\\
>>>> University of Northern Iowa                      _\_V
>>>> Message void if penguin violated ...  Don't mess with the penguin
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