You'll find more details about cipher lists on this URL: SSL_CTX_set_cipher_list() and SSL_set_cipher_list() first appeared in SSLeay 0.5.2 and have been available since OpenBSD 2.4. The list of ciphers is inherited by all ssl objects created from ctx. maybe I've misunderstood what it does SSL_set_cipher_list() sets the list of ciphers only for ssl. set_cipher_list() sets TLSv1.2 (and below) ciphers, and its success or failure should not depend on whether set_ciphersuites() has been used to setup TLSv1.3 ciphers. For OpenSSL and GnuTLS valid examples of cipher lists include 'RC4-SHA', ´SHA1+DES´, 'TLSv1' and 'DEFAULT'. Only connections using TLS version 1.2 and lower are affected. Simply we can check remote TLS/SSL connection with s_client.In these tutorials, we will look at different use cases of s_client .. OpenSSL provides different features and tools for SSL/TLS related operations. The default list is normally set when you compile OpenSSL. There is currently no setting that controls the cipher choices used by TLS version 1.3 connections. When I run 'openssl ciphers -v' I get a long unordered list of ciphers. Check TLS/SSL … ubuntu@server-1359495587-az-2-region-a-geo-1:~$ openssl ciphers + ECDHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-AES256-GCM-SHA384 but after I run the command the cipher list order is still the same. Specifies a list of SSL cipher suites that are allowed to be used by SSL connections. The format of the string is described in ciphers(1). It can be used as a test tool to determine the appropriate cipherlist. ssl.honor-cipher-order = "enable" ssl.cipher-list = "EECDH+AESGCM: ... Lighttpd or Apache config. openssl ciphers [-v] [-V] [-ssl2] [-ssl3] [-tls1] [cipherlist] Description. When using OpenSSL, how can I disable certain ciphers, disable certain versions (SSLv2), and perhaps how to enable only certain ciphers? These provide Strong SSL Security for all modern browsers, plus you get an A+ on the SSL Labs Test. For OpenSSL and GnuTLS valid examples of cipher lists include 'RC4-SHA', 'SHA1+DES', 'TLSv1' and 'DEFAULT'. You can use SSL_CTX_set_cipher_list() to limit the list of ciphers.. #include #include // List of allowed ciphers in a colon-seperated list. The default list is normally set when you compile OpenSSL. Name. In the 'Network Security with OpenSSL' book, it states that SSL will usually use the first cipher in a list to make the connection with. SSL_CTX_set_cipher_list() sets the list of available ciphers for ctx using the control string str. NOTES s_lient is a tool used to connect, check, list HTTPS, TLS/SSL related information. The ciphers command converts textual OpenSSL cipher lists into ordered SSL cipher preference lists. See the ciphers manual page in the OpenSSL package for the syntax of this setting and a list of supported values. can someone help and/or clarify exactly what the point of this command is? 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