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From: Adrian Klaver <[email protected]>
To: Zwettler Markus (OIZ) <[email protected]>
To: Tom Lane <[email protected]>
To: [email protected] <[email protected]>
Subject: Re: could not accept ssl connection tlsv1 alert unknown ca
Date: Fri, 31 Jan 2025 08:37:24 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <GV0P278MB009999F084B3BEE630C0AA8F8BE82@GV0P278MB0099.CHEP278.PROD.OUTLOOK.COM>
References: <GV0P278MB0099D57F417CC2985E16BDBB8BE92@GV0P278MB0099.CHEP278.PROD.OUTLOOK.COM>
	<[email protected]>
	<GV0P278MB009999F084B3BEE630C0AA8F8BE82@GV0P278MB0099.CHEP278.PROD.OUTLOOK.COM>

On 1/31/25 00:57, Zwettler Markus (OIZ) wrote:
>> Von: Tom Lane <[email protected]>

>> Those cause some additional checks to be made, but it's not like you can expect a
>> completely broken certificate to work without them.
>>
>>                          regards, tom lane
> 
> 
> 
> I don't understand why Postgres does a certificate validation with “sslmode=prefer”. Postgres should simply ignore every presented client certificate here. Regardless of whether it is trusted or not.

What are the relevant lines in pg_hba.conf?

> 
> A certificate validation should only take place in the modes “sslmode=verify-ca” and “ssmode=verify-full”. Only here should Postgres refuse a connection with non-trusted certificates.
> 
> At least that's what I read in the documentation. No?
> 
> Regards, Markus
> 

-- 
Adrian Klaver
[email protected]







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