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From: Florian Weimer <fw@deneb.enyo.de>
To: Mark Brown <broonie@kernel.org>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>,
  users@linux.kernel.org,  tools@linux.kernel.org
Subject: Re: Resolver splat from b4 am
References: <Yx8kXFRXB0chuYkL@sirena.org.uk>
Date: Mon, 12 Sep 2022 14:27:46 +0200
In-Reply-To: <Yx8kXFRXB0chuYkL@sirena.org.uk> (Mark Brown's message of "Mon,
	12 Sep 2022 13:21:48 +0100")
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* Mark Brown:

>     raise NoNameservers(request=self.request, errors=self.errors)
> dns.resolver.NoNameservers: All nameservers failed to answer the query 20210112._domainkey.quanta-corp-partner-google-com.20210112.gappssmtp.com. IN TXT: Server 172.16.32.1 UDP port 53 answered ; Server 172.16.32.1 TCP port 53 answered [Errno 111] Connection refused

This looks like missing TCP DNS service on your network.  The DNS
response is larger than 512 bytes, so it can't be transmitted over UDP.