Re: psql v16.3 successfully connects via TLSv1.3 proxy, but psql v16.4 says "tlsv1 alert no application protocol"

From: Markus KARG <markus(at)headcrashing(dot)eu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: psql v16.3 successfully connects via TLSv1.3 proxy, but psql v16.4 says "tlsv1 alert no application protocol"
Date: 2024-12-25 17:45:06
Message-ID: 036d3915-e6ef-420b-ba2b-5cd7e94e0a66@headcrashing.eu
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> Markus KARG<markus(at)headcrashing(dot)eu> writes:
>> Summary: The TLS behavior of psql changed between 16.3 and 16.4 as shown
>> below.
> Have you tried the current release (16.6)?
>
> regards, tom lane

Yes, but psql 16.6 fails in the same way:

root(at)hetzner-2:~# docker run -it postgres:16.6 psql
"host=headcrashing.eu port=5432 dbname=postgres user=postgres
password=HeadcrashingPostgres2022 sslmode=require"
psql: error: connection to server at "headcrashing.eu" (49.13.53.107),
port 5432 failed: SSL error: tlsv1 alert no application protocol

-Markus

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