[outages] Seemingly Nationwide Comcast DNS Outage

[Cary Wiedemann]

Just confirming this outage affected my sites from Virginia to California.
Start time was just before 2:32pm EST and resolution came around 2:54pm EST.

Looks like anycast routing woes.  Not good.

- Cary


On Thu, Jan 23, 2020 at 3:38 PM Chris Cherry via Outages <
outages at outages.org> wrote:

> No issue here with my 5 Comcast Business accounts (central Indiana),
> although we are using OpenDNS.  The VPN tunnels are up and running between
> those sites.  Friends of mine who live up near Chicago who use Comcast and
> use the default DNS servers from them are reporting they are up and running.
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *Christopher Trudeau via Outages <outages at outages.org>
> *Sent: *Thursday, January 23, 2020 3:28 PM
> *To: *outages at outages.org
> *Subject: *[outages] Seemingly Nationwide Comcast DNS Outage
>
>
>
> Seeing many recent reports on the interwebs regarding a “nationwide
> Comcast outage”.
>
> Looks like it’s an issue with Comcast DNS (75.75.75.75 / 75.75.76.76) and
> not anything else, as queries to other public DNS servers (ex: 1.1.1.1 /
> 8.8.8.8) work just fine over my Comcast service.
>
>
>
> For reference, I’m located in Chicago, but I did perform NSLookup’s from a
> box in NYC, Dallas, and Seattle which resulted in similar behavior as seen
> below.
>
>
>
> nslookup google.com 75.75.75.75
>
> Server:  UnKnown
>
> Address:  75.75.75.75
>
> *** UnKnown can't find google.com: Query refused
>
>
>
> nslookup google.com 75.75.76.76
>
> Server:  UnKnown
>
> Address:  75.75.76.76
>
> *** UnKnown can't find google.com: Query refused
>
>
>
> nslookup google.com 1.1.1.1
>
> Server:  one.one.one.one
>
> Address:  1.1.1.1
>
>
>
> Non-authoritative answer:
>
> Name:    google.com
>
> Addresses:  2607:f8b0:4009:812::200e
>
>           172.217.5.14
>
>
>
> nslookup google.com 8.8.8.8
>
> Server:  dns.google
>
> Address:  8.8.8.8
>
>
>
> Non-authoritative answer:
>
> Name:    google.com
>
> Addresses:  2607:f8b0:4009:80f::200e
>
>           216.58.192.238
>
>
>
>
>
>
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