Cloudflare public DNS broken w/ AT&T CPE

David Conrad drc at
Mon Apr 2 17:49:53 UTC 2018

Wait. What?

Why do you think 1/8 shouldn’t be used for anything?



> On Monday, Apr 02, 2018 at 11:40 AM, Seth Mattinen <sethm at (mailto:sethm at> wrote:
> On 4/2/18 8:35 AM, Simon Lockhart wrote:
> >
> > 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.
> To be fair, nobody should have been using 1/8 for anything.
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