[outages] Google DNS

[Andy Brezinsky]

For those that don't know this, if you want to know which cluster you're 
hitting, you can run:

$ dig o-o.myaddr.l.google.com -t txt +short @8.8.8.8
"172.253.192.142"
"edns0-client-subnet x.x.x.0/24"

That will return the ipv4/ipv6 address of the server that handled your 
request.  To get a list of what subnets map to which locations (airport 
codes), you can run:

$ dig -t TXT +short locations.publicdns.goog. @8.8.8.8

snip... "172.253.192.0/24 cbf ..snip

cbf = Council Bluffs, IA


On 5/13/21 10:33 AM, Jay Ashworth via Outages wrote:
> And, more importantly, 'Google DNS' -- specifically Google customer 
> resolver DNS, the stuff they provide at 8.8.8.8 -- is generally IP 
> anycast, so depending on your geographic and network location, you are 
> hitting different servers when you go to that IP.
>
> On May 13, 2021 10:56:34 AM EDT, Warren Kumari via Outages 
> <outages at outages.org> wrote:
>
>
>
>     On Thu, May 13, 2021 at 10:41 AM John Cornelius via Outages
>     <outages at outages.org <mailto:outages at outages.org>> wrote:
>
>         Getting reports of issues with Google DNS. Can anyone confirm
>         similar issues?
>
>
>     When you say "reports of issues", can you be any more specific?
>     Unable to ping the address?
>     Not getting any answers?
>     Getting answers without the AD bit?
>     Getting slow answers?
>     Getting wrong answers?
>     Only answering over TCP/UDP/<something>?
>     Only getting answers to some types of queries?
>     Some set of names not resolving (if so, which?)?
>     Older names in cache?
>     A name was changed and it doesn't seem to be picked up yet?
>
>     "issues" is a very broad term...
>
>
>     W
>
>         Location:  Kentucky.
>
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>
>     -- 
>     The computing scientist’s main challenge is not to get confused by the
>     complexities of his own making.
>       -- E. W. Dijkstra
>
>
> -- 
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>
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