Use UDP for (small) incremental zone transfers?

[Greg Choules]

Hi Jesus.
No. Zone Transfer always uses TCP. Is it really that much of an overhead
for you?

Cheers, Greg

On Fri, 13 Jan 2023 at 05:56, Jesus Cea <jcea at jcea.es> wrote:

> I have a dns zone with many dns updates per minute. The updates are
> tiny, like 2-3 records, <500 bytes in total.
>
> Currently my secondaries receive a NOTIFY and they do a TCP connection
> to request a incremental zone transfer. We know that TCP is "heavy" and
> the data I need to transfer is tiny before shutting down the TCP
> connection.
>
> Is there any way to do incremental zone transfer via UDP and, if the
> size is too big (>1232 bytes), fall back to TCP?
>
> Thanks!
>
> PS: I protect everything using TSIG.
>
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