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Date: Wed, 5 Jan 2022 10:09:35 +0100 (CET)
From: Dietmar Maurer <dietmar@proxmox.com>
To: Proxmox Backup Server development discussion <pbs-devel@lists.proxmox.com>, 
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Subject: Re: [pbs-devel] [PATCH proxmox-backup v2 0/3] close #3612: allow
 config of SSL cipher-suites for proxy
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> I can do the following without getting an error:
> 
> # proxmox-backup-manager node update --cipher-suites-tls2 asdasd,BBB,BBB.XZY
> 
> This makes no sense to me!

Need to correct myself, I get the following error:

Error: error:1410D0B9:SSL routines:SSL_CTX_set_cipher_list:no cipher match:../ssl/ssl_lib.c:2566:

But this does not throw an error:

# proxmox-backup-manager node update --cipher-suites-tls2 asdasd,BBB,BBB.XZY,ECDHE-RSA-AES256-SHA

Seems ssl simply ignores all unknown ciphers. The only error is when the list contains no known cipher.