named tcp dos?

Matus UHLAR - fantomas uhlar at
Fri Aug 3 12:17:41 UTC 2018

>Randy Bush <randy at> 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 |
>  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.

Matus UHLAR - fantomas, uhlar at ;
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