[Outages-discussion] [outages] Seemingly Nationwide Comcast DNS Outage

[John Neiberger]

https://lists.dns-oarc.net/pipermail/dns-operations/2020-January/019677.html

On Thu, Jan 23, 2020 at 3:10 PM Frank Bulk <frnkblk at iname.com> wrote:

> Some news here:
> https://www.phillyvoice.com/comcast-nationwide-internet-outage-2020-january-23-philadelphia/
>
>
>
> Frank
>
>
>
> *From:* Outages <outages-bounces at outages.org> *On Behalf Of *Cary
> Wiedemann via Outages
> *Sent:* Thursday, January 23, 2020 3:02 PM
> *To:* Chris Cherry <cwcherry at outlook.com>
> *Cc:* outages at outages.org
> *Subject:* Re: [outages] Seemingly Nationwide Comcast DNS Outage
>
>
>
> 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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