Facebook post-mortems...

Joe Greco jgreco at ns.sol.net
Tue Oct 5 12:52:55 UTC 2021

On Tue, Oct 05, 2021 at 02:22:09PM +0200, Mark Tinka wrote:
> On 10/5/21 14:08, Jean St-Laurent via NANOG wrote:
> >Maybe withdrawing those routes to their NS could have been mitigated by 
> >having NS in separate entities.
> Well, doesn't really matter if you can resolve the A/AAAA/MX records, 
> but you can't connect to the network that is hosting the services.
> At any rate, having 3rd party DNS hosting for your domain is always a 
> good thing to have. But in reality, it only hits the spot if the service 
> is also available on a 3rd party network, otherwise, you keep DNS up, 
> but get no service.

That's not quite true.  It still gives much better clue as to what is
going on; if a host resolves to an IP but isn't pingable/traceroutable,
that is something that many more techy people will understand than if
the domain is simply unresolvable.  Not everyone has the skill set and
knowledge of DNS to understand how to track down what nameservers 
Facebook is supposed to have, and how to debug names not resolving.
There are lots of helpdesk people who are not expert in every topic.

Having DNS doesn't magically get you service back, of course, but it
leaves a better story behind than simply vanishing from the network.

... JG
Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net
"The strain of anti-intellectualism has been a constant thread winding its way
through our political and cultural life, nurtured by the false notion that
democracy means that 'my ignorance is just as good as your knowledge.'"-Asimov

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