Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE

Hank Nussbacher hank at efes.iucc.ac.il
Mon Apr 2 16:34:18 UTC 2018


On 02/04/2018 18:35, Simon Lockhart wrote:
> On Mon Apr 02, 2018 at 11:17:47AM -0400, John Levine wrote:
>> So it's routed deliberately but it sure looks like an experiment.
>> There's way too much equipment that treats 1.1.1.1 as magic for it to
>> work reliably.  Captive portals tend to use that address for the host
>> you contact to log out.
> Quite.
>
> This looks like a willy-waving exercise by Cloudflare coming up with the lowest
> quad-digit IP. They must have known that this would cause routing issues, and
> now suddenly it's our responsibility to make significant changes to live
> infrastructures just so they can continue to look clever with the IP address.
>
> Simon

Perhaps they are running all  this to shake out exactly these type of
issues?  I think that is exactly why APNIC research is called for.

-Hank



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