Eventdns: All name servers have failed

[David Carlson]

On 4/20/2010 6:14 AM, Scott Bennett wrote:
>       On Tue, 20 Apr 2010 05:50:42 -0500 (CDT) I wrote:
>    
>>      On Mon, 19 Apr 2010 19:00:20 -0500 David Carlson
>> <carlson.dl at sbcglobal.net>  wrote:
>>      
>>> I am a newbie here, so perhaps this is an overly naive response to this
>>>        
>>      All of us have been at some point.
>>
>>      
>>> subject.
>>>        
>>      Your discussion below presents one plausible explanation.
>>      
>>> I am using Windows XP and I am behind a digital modem provided by AT&T.
>>>   That modem is the DNS for my local network.
>>>        
>>      Does your LAN have any non-Windows systems on it on which you might
>> more easily run a name server of your own?
>>      
>>> I see that message at times when I think that AT&T is re-booting that=20
>>> modem (lately that is at least once a night), which would make the DNS
>>>        
>>      Why do you think that is happening?  Does it have a column of lights
>> that show a distinct pattern when the modem is reinitializing itself?
>>
>>      
>>> un-available for a short time.
>>>        
>>      
>       I see I thoroughly garbled the following sentence (aarrghh...).
>
>    
>>      Another possibility is that the other end of the connection is on
>> an ISP subnet that is momentarily flooded with traffic, resulting in your
>> LAN's queries or the ISP's name server's responses from completing their
>>      
>                                                      ^^^^^^^^^^^^^^^
> That should read, "failing to complete".  Apologies for the noise.
>
>    
>> trips before the timeout period expires.  The default timeout period for
>> DNS queries these days is normally only 3 s.
>>      
>>> I am sure there are other possible causes, but when this is suspected, I
>>>
>>> would just let the notes fill up the log.
>>>
>>>        
>>      It's certainly worth further investigation.  A phone call to the ISP
>> to find out what its policies and practices are about daily reboots and
>> so on might be well worth your time.
>>      
>
>                                    Scott Bennett, Comm. ASMELG, CFIAG
> **********************************************************************
> * Internet:       bennett at cs.niu.edu                              *
> *--------------------------------------------------------------------*
> * "A well regulated and disciplined militia, is at all times a good  *
> * objection to the introduction of that bane of all free governments *
> * -- a standing army."                                               *
> *    -- Gov. John Hancock, New York Journal, 28 January 1790         *
> **********************************************************************
>
>    
As it happens, later today a technician will be here to find out why my 
television box lost about 20 Gig of recorded programs a few days ago, so 
I will ask him.

Dave
***********************************************************************
To unsubscribe, send an e-mail to majordomo at torproject.org with
unsubscribe or-talk    in the body. http://archives.seul.org/or/talk/