[Cialug] DNS Issues

[Stuart Thiessen]

When I use nslookup with or without an alternative DNS server, it says:

;; connection timed out; no servers could be reached

Thanks,

Stuart

On Aug 23, 2005, at 16:42, n.d wrote:

> have you tried to manually use different dns servers in nslookup???
>
> nslookup google.com <other.dns.server>
>
> ??
>
> i don't know if this would help any, but it might tell you if your 
> resolv.conf is being read or not.
>
> and maybe try traceroute <some.ip.on.the.internet> from it too
>
> just to show packets can get to the internet, if not then you can tell 
> whether or not its even able to reach the internet.
>
> just a thought.
>
> Stuart Thiessen wrote:
>
>> Entries in the /etc/hosts file resolve fine (name or IP).  Anything 
>> else does not.  I did not configure bind for this server because it 
>> was working fine just having Qwest's DNS servers and then hosts to 
>> cover the internal network.  nscd is up and running.  Am I missing a 
>> program somewhere that works with resolv.conf?
>>
>> THanks,
>>
>> Stuart
>>
>> On Aug 23, 2005, at 16:32, n.d wrote:
>>
>>> can you resolve anything from it(the computer in question)??
>>>
>>>
>>> Stuart Thiessen wrote:
>>>
>>>> I have been running the SUSE online updates periodically. I had no 
>>>> problems until today. All of a sudden, email is holding up in the 
>>>> queue and that was the clue that it was not able to use DNS to find 
>>>> the servers to pass along the emails.  I did a ping and it pings to 
>>>> our BSD firewall with no problem, but it cannot ping any name or ip 
>>>> address outside the firewall.  All other computers on that network 
>>>> are working just fine to get to the internet. Only this email 
>>>> server is messed up.  I restarted nscd twice to no avail.  I reset 
>>>> resolv.conf to point to my DNS servers instead of theirs, but that 
>>>> didn't work. I tried pointing it to the firewall, but that didn't 
>>>> work, then I just left it as it was originally (which was working 
>>>> prior to today). I did restart nscd each time I changed 
>>>> resolv.conf.
>>>>
>>>> No updates have happened in about a week's time and the problem 
>>>> cropped up today. So I don't think it is the result of an update.
>>>>
>>>> Any other suggestions?  What is the log for resolv.conf?
>>>>
>>>> Thanks,
>>>>
>>>> Stuart
>>>>
>>>> On Aug 23, 2005, at 16:04, albus wrote:
>>>>
>>>>> have you done an update? and if so have you checked iptables?
>>>>>
>>>>> joel
>>>>>
>>>>>
>>>>> ----- Original Message ----- From: "Stuart Thiessen" 
>>>>> <sthiessen at passitonservices.org>
>>>>> To: "Central Users Group Iowa Linux" <cialug at cialug.org>
>>>>> Sent: Tuesday, August 23, 2005 3:57 PM
>>>>> Subject: [Cialug] DNS Issues
>>>>>
>>>>>
>>>>>> Ok, I have encountered a very strange issue .... DNS on one 
>>>>>> server was working fine using Qwest DNS servers and all of a 
>>>>>> sudden this afternoon it stopped working. I checked resolv.conf 
>>>>>> and compared it to our firewall server and it is the same. The 
>>>>>> firewall server is doing just fine with DNS queries, but not this 
>>>>>> other server. It handles email and webmail from behind the 
>>>>>> firewall.  It can ping the firewall but it can't ping outside 
>>>>>> with name or IP.  My next step is to check the firewall, but no 
>>>>>> one else behind the firewall is complaining about being unable to 
>>>>>> get out.  This is preventing the email from getting out.
>>>>>> Any thoughts?
>>>>>> Thanks,
>>>>>> Stuart
>>>>>> This is SUSE Linux 9.2. I ran the updates recently on it.  I'm a 
>>>>>> little confused as to what is going on.
>>>>>> _______________________________________________
>>>>>> Cialug mailing list
>>>>>> Cialug at cialug.org
>>>>>> http://cialug.org/mailman/listinfo/cialug
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Cialug mailing list
>>>>> Cialug at cialug.org
>>>>> http://cialug.org/mailman/listinfo/cialug
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> Cialug mailing list
>>>> Cialug at cialug.org
>>>> http://cialug.org/mailman/listinfo/cialug
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Cialug mailing list
>>> Cialug at cialug.org
>>> http://cialug.org/mailman/listinfo/cialug
>>>
>>>
>>
>> _______________________________________________
>> Cialug mailing list
>> Cialug at cialug.org
>> http://cialug.org/mailman/listinfo/cialug
>
>
>
>
> _______________________________________________
> Cialug mailing list
> Cialug at cialug.org
> http://cialug.org/mailman/listinfo/cialug
>
>