On Wed, Dec 21, 2022 at 09:41:55PM -0500, Pierre-Luc Boily wrote: > C:\Program Files\OpenSSL\bin>openssl ciphers -V 'ALL:COMPLEMENTOFALL' Could it be something as simple the Windows shell passing the "'" charaxcters as part of the value? Do double-quotes, or no quotes work better? On a Unix system: $ openssl ciphers -V "'ALL:COMPLEMENTOFALL'" Error in cipher list 34371141632:error:140E6118:SSL routines:ssl_cipher_process_rulestr:invalid command:/usr/src/crypto/openssl/ssl/ssl_ciph.c:1028: 34371141632:error:140E6118:SSL routines:ssl_cipher_process_rulestr:invalid command:/usr/src/crypto/openssl/ssl/ssl_ciph.c:1028: -- Viktor.