[dns-operations] new public DNS service:

Ray Bellis ray at isc.org
Tue Nov 21 16:25:54 UTC 2017

On 21/11/2017 16:12, Stephane Bortzmeyer wrote:

> RTT measurement is also a good idea. If Google Public DNS suddenly
> gets much closer, it may mean Google added a server… or that your ISP
> hijacked

It was observed during RIPE that DNS lookups to F root from the Conrad
hotel's network were being intercepted, although traceroutes were not.

It was possible to observe this (among other means) by seeing that the
ping RTT was much higher than the DNS RTT.


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