[Cialug] DNS Issues

[Stuart Thiessen]

I understand the question. :)

Well the funny thing of all of this is that the rest of the network's 
users are having no problem.  This Linux server that is giving me 
problems is able to receive and process email, and do everything fine 
except for the fact that it cannot see outside of the local network. I 
ran a test by running a ping on www.yahoo.com and then put the ip 
address and www.yahoo.com in my /etc/hosts file.  It still is unable to 
do anything with it. So that seems to point to a routing problem.  Now, 
does Linux require a daemon to be running to manage routes?  At this 
point, I can't see anything running that managed routes, but I did not 
install anything extra to manage routes.

Hmmmm,

Stuart
On Aug 23, 2005, at 18:14, albus wrote:

> stupid question. have you checked the obvious.
> NIC Card, CABLES have you reset your switch
> some of those things.
>
> ----- Original Message ----- From: "Stuart Thiessen" 
> <sthiessen at passitonservices.org>
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Sent: Tuesday, August 23, 2005 6:10 PM
> Subject: Re: [Cialug] DNS Issues
>
>
>> 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:
>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>> Hash: SHA1
>>>> 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:
>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>> Hash: SHA1
>>>>>
>>>>> 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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