named tcp dos?

[Matus UHLAR - fantomas]

>Randy Bush <randy at psg.com> wrote:
>> estimate or measure the distribution of the ratio of udp to tcp queries
>> on say 100 cctld servers.

On 03.08.18 12:10, Tony Finch wrote:
>On a recently rebooted auth server, which hosts zones for a handful of
>universities with and without DNSSEC, slightly less than 1% of queries are
>over TCP.
>
>$ curl -Ssf http://authdns1.csx.cam.ac.uk:8053/json/v1 |
>  jq '[ .nsstats.QryUDP, .nsstats.QryTCP ]'
>[
>  6994195,
>  61575
>]
>
>I have a few config options which can affect TCP usage. These two should
>reduce it:
>
>	minimal-responses yes;
>	minimal-any yes;

I don't think so. minimal-responses only skip unnecessary info, so they
should have no effect on TCP retries.

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