bind9.20.11-4deb and Windows Server 2015 DNS Problem

[Petr Špaček]

On 26. 08. 25 9:25, Daniel Marquez-Klaka wrote:
> I recently upgraded from Deb12 to Deb 13 and thereby from bind 
> 9.18.33-1deb to 9.20.11-4deb.
> While in former version everything was running as expected I observed a 
> (to me) strange behavior between bind9.20.11-4-deb and Windows Server 
> 2016, Version 1607 Build: 14393.8148 running as Domain Controler.
> 
> In short, DC as primary, bind9 as secondary. Transfer fails with:
> 
> 
> 25-Aug-2025 07:06:46.519 xfer-in: debug 10: 0x7fbd93256000: transfer of 
> '245.10.in-addr.arpa/IN/dmz.stp' from 10.245.33.20#53: 
> dns_message_parse: unexpected end of input

I think you are hitting Windows DNS issue which is described in
https://gitlab.isc.org/isc-projects/bind9/-/issues/5168

Please report to Microsoft their DNS server does not cope with EDNS 
correctly.

-- 
Petr Špaček