9.18 behavior change for mDNS queries with dig

[Petr Špaček]

On 27. 06. 22 8:26, Evan Hunt wrote:
> On Sun, Jun 26, 2022 at 10:00:08PM -0500, Larry Stone wrote:
>> I recently moved from 9.16 to 9.18 and just noticed that dig no longer
>> resolves mDNS queries.
>>
>> With 9.16:
>> dig +short @224.0.0.251 -p 5353 hostname.local
>> 192.168.0.82
>>
>> With 9.18:
>> dig +short @224.0.0.251 -p 5353 hostname.local
>> ;; connection timed out; no servers could be reached
>>
>> I can’t find anything in the Release Notes (or anyplace else) about this.
> 
> "dig" was rewritten in 9.18 to use the libuv-based network manager
> instead of the old socket code; it's probably related to that.  Please
> open a bug report at https://gitlab.isc.org/isc-projects/bind9/-/issues,
> we'll look into it.

Please don't forget to attach PCAP file produced by tcpdump or similar 
tool so we can see if anything happens on the wire or not.

-- 
Petr Špaček