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Re: Weather.Gov DNS

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Posted by
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Member Since: ‎01-24-2012
Posts: 3
Message 2 of 19 (2,439 Views)

Re: Weather.Gov DNS

i can confirm that only weather.gov is down only with comcast.  I've checked with others not using comcast and they are up and running.

18 REPLIES
Posted by
Edited on
‎01-24-2012 12:01 PM

Silver Problem Solver

Member Since: ‎10-17-2003
Posts: 4,956
Message 1 of 19 (2,452 Views)

Re: Weather.Gov DNS

[ Edited ]

Weather.gov and noaa.gov are not accessible again...

 

The Comcast DNS cache check shows only Denver returning an address.

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Member Since: ‎01-24-2012
Posts: 3
Message 3 of 19 (2,434 Views)

Re: Weather.Gov DNS

i did a quick search to figure out how to change my dns server to google... I switched it and weather.gov is running perfectly.  I'm soooo dissapointed with comcast.  TV and Internet.

Posted by
Contributor

Member Since: ‎03-14-2008
Posts: 68
Message 4 of 19 (2,420 Views)

Re: Weather.Gov DNS

Not working here also, though I use noaa.gov as my URL.  Changed to the public DNS 8.8.8.8.8, and it works.

Posted by
Edited on
‎01-24-2012 02:51 PM

Problem Solver

Member Since: ‎07-10-2008
Posts: 329
Message 5 of 19 (2,406 Views)

Re: Weather.Gov DNS

[ Edited ]

For those of you experiencing issues with weather.gov and noaa.gov, can you please post traceroute and pings to those sites?  Can you please also confirm what DNS server you are pointing to when running traceroute and ping?

 

We could really use your help providing this data so we can troubelshoot further. If you have any additional questions, please PM me.

 

Thanks

Chris

Comcast

 

 

Posted by
Edited on
‎01-24-2012 03:07 PM

Gold Problem Solver

Member Since: ‎12-03-2007
Posts: 12,274
Message 6 of 19 (2,378 Views)

Re: Weather.Gov DNS

[ Edited ]

ctg1701a wrote: ... can you please post traceroute and pings to those sites? ...

If you'll explain how to run ping and traceroute for a host which DNS cannot resolve, I'd be happy to help.

 

Meanwhile:

 

  nslookup Weather.gov 75.75.75.75  (Comcast)
  Server:  cdns01.comcast.net
  Address:  75.75.75.75
  *** cdns01.comcast.net can't find Weather.gov: Server failed

  nslookup Weather.gov 8.8.4.4  (Google)
  Address:  204.227.127.201

  nslookup Weather.gov 4.2.2.1  (Verizon)
  Address:  204.227.127.201

  nslookup Weather.gov 208.67.220.220  (OpenDNS)
  Address:  204.227.127.201

 

I'm in York PA, 17401.

 

This post might be relevant: http://forums.comcast.com/t5/Connectivity-and-Modem-Help/NASA-gov-blocked/m-p/1170279#M146392

Posted by
Problem Solver

Member Since: ‎07-10-2008
Posts: 329
Message 7 of 19 (2,373 Views)

Re: Weather.Gov DNS


BruceW wrote:

ctg1701a wrote: ... can you please post traceroute and pings to those sites? ...

If you'll explain how to run ping and traceroute for a host which DNS cannot resolve, I'd be happy to help.

 

Meanwhile:

 

  nslookup Weather.gov 75.75.75.75  (Comcast)
  Server:  cdns01.comcast.net
  Address:  75.75.75.75
  *** cdns01.comcast.net can't find Weather.gov: Server failed

  nslookup Weather.gov 8.8.4.4  (Google)
  Address:  204.227.127.201

  nslookup Weather.gov 4.2.2.1  (Verizon)
  Address:  204.227.127.201

  nslookup Weather.gov 208.67.220.220  (OpenDNS)
  Address:  204.227.127.201

 

I'm in York PA, 17401.


Can you please run a traceroute to 75.75.75.75 from your location?  This will show us which resolver you location you are pointed to.

 

Thanks

Chris

Comcast

Posted by
Gold Problem Solver

Member Since: ‎12-03-2007
Posts: 12,274
Message 8 of 19 (2,370 Views)

Re: Weather.Gov DNS


ctg1701a wrote: ... Can you please run a traceroute to 75.75.75.75 from your location? ...

C>tracert 75.75.75.75

Tracing route to cdns01.comcast.net [75.75.75.75] over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  router [192.168.1.1]
  2    36 ms    30 ms    29 ms  174.49.192.1
  3    11 ms     9 ms     9 ms  te-0-7-0-2-sur01.york.pa.pitt.comcast.net [68.85.43.241]
  4    12 ms    11 ms    11 ms  te-0-12-0-2-ar03.lowerpaxton.pa.pitt.comcast.net [69.139.194.57]
  5    23 ms    22 ms    19 ms  te-0-7-0-1-ar03.pittsburgh.pa.pitt.comcast.net [69.139.194.214]
  6    31 ms    38 ms    32 ms  pos-4-14-0-0-cr01.newyork.ny.ibone.comcast.net [68.86.94.185]
  7    35 ms    35 ms    35 ms  pos-2-14-0-0-ar01.needham.ma.boston.comcast.net [68.86.93.34]
  8    36 ms    35 ms    35 ms  te-4-1-ur01.chelmsfdrdc2.ma.boston.comcast.net [68.87.145.230]
  9     *       37 ms    35 ms  cdns01.comcast.net [75.75.75.75]

Trace complete.

Posted by
Official Employee

Member Since: ‎10-17-2011
Posts: 65
Message 9 of 19 (2,358 Views)

Re: Weather.Gov DNS

It kind of looks like a bunch of .gov domains had a key rollover problem. We're investigating.

 

Chris

Posted by
Problem Solver

Member Since: ‎07-10-2008
Posts: 329
Message 10 of 19 (2,405 Views)

Re: Weather.Gov DNS


BruceW wrote:

ctg1701a wrote: ... Can you please run a traceroute to 75.75.75.75 from your location? ...

C>tracert 75.75.75.75

Tracing route to cdns01.comcast.net [75.75.75.75] over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  router [192.168.1.1]
  2    36 ms    30 ms    29 ms  174.49.192.1
  3    11 ms     9 ms     9 ms  te-0-7-0-2-sur01.york.pa.pitt.comcast.net [68.85.43.241]
  4    12 ms    11 ms    11 ms  te-0-12-0-2-ar03.lowerpaxton.pa.pitt.comcast.net [69.139.194.57]
  5    23 ms    22 ms    19 ms  te-0-7-0-1-ar03.pittsburgh.pa.pitt.comcast.net [69.139.194.214]
  6    31 ms    38 ms    32 ms  pos-4-14-0-0-cr01.newyork.ny.ibone.comcast.net [68.86.94.185]
  7    35 ms    35 ms    35 ms  pos-2-14-0-0-ar01.needham.ma.boston.comcast.net [68.86.93.34]
  8    36 ms    35 ms    35 ms  te-4-1-ur01.chelmsfdrdc2.ma.boston.comcast.net [68.87.145.230]
  9     *       37 ms    35 ms  cdns01.comcast.net [75.75.75.75]

Trace complete.


Can you please retry your DNS lookup now?  It seems there was a key rollover for DNSSEC for .gov domains and we had cached entries that had not timed out for the old keys.

 

Thanks

Posted by
Visitor
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Member Since: ‎01-24-2012
Posts: 1
Message 11 of 19 (2,350 Views)

Re: Weather.Gov DNS

Umm I just wanted to report Atlanta Ga wouldn't connect to noaa.gov or weather.gov.  but it has just started working now. 

Posted by
Gold Problem Solver

Member Since: ‎12-03-2007
Posts: 12,274
Message 12 of 19 (2,345 Views)

Re: Weather.Gov DNS


ctg1701a wrote: ... Can you please retry your DNS lookup now? ...

   nslookup Weather.gov 75.75.75.75  (Comcast)
   Server:  cdns01.comcast.net
   Address:  75.75.75.75

   Non-authoritative answer:
   Name:    Weather.gov
   Address:  204.227.127.201

 

All better for me -- Noaa.gov is OK too.

 

Posted by
Contributor

Member Since: ‎03-14-2008
Posts: 68
Message 13 of 19 (2,308 Views)

Re: Weather.Gov DNS

Seems to be OK here now too.  Thanks!

Posted by
Official Employee

Member Since: ‎05-09-2007
Posts: 1,122
Message 14 of 19 (2,292 Views)

Re: Weather.Gov DNS

I hope to be able to work with the team to do a detailed analysis of what happened. We just completed something similar for NASA.GOV. See http://www.dnssec.comcast.net/DNSSEC_Validation_Failure_NASAGOV_20120118_FINAL.pdf

JL
Internet Services


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Posted by
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Member Since: ‎01-25-2012
Posts: 4
Message 15 of 19 (2,258 Views)

Re: Weather.Gov DNS

Can the powers that be allow dig +dnssec +trace output much like you allow querying of your nameservers via a web page?  It is hard to debug when at work without access to the Comcast DNS servers.

Posted by
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Member Since: ‎11-21-2010
Posts: 11
Message 16 of 19 (2,227 Views)

Re: Weather.Gov DNS

Having the same problem in Philadelphia area..   My Nexrad Radar software stopped working, and traced the problem to not being able to access Noaa.gov and  weather.gov

Posted by
Edited on
‎01-27-2012 08:26 AM

Gold Problem Solver

Member Since: ‎12-03-2007
Posts: 12,274
Message 17 of 19 (2,224 Views)

Re: Weather.Gov DNS

[ Edited ]

Looks like the Feds have messed up their DNSSEC again. Comcast correctly resolves "noaa.gov", but HTTP requests to "noaa.gov" are redirected to "www.noaa.gov", which does not resolve correctly. See http://dnsviz.net/d/www.noaa.gov/dnssec/.

Posted by
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Member Since: ‎01-25-2012
Posts: 4
Message 18 of 19 (2,170 Views)

Re: Weather.Gov DNS

BTW, we looked at this a bit, for www.noaa.gov.

 

The visual tool has an option to refresh all the data.  The default uses some cached keys, which

can give some warnings.  Once we used the refreshed data, it looked correct.

-

Posted by
Connection Expert

Member Since: ‎12-24-2003
Posts: 53,816
Message 19 of 19 (602 Views)

Re: Weather.Gov DNS