Hi all,

In OpenSSL version of NetSSL, you are using SSL_CTX_set_cipher_list method to set cipher list:

But the point is that this method only affects TLSv1.2 and below, and for TLSv1.3 you need to use SSL_CTX_set_ciphersuites() method based on OpenSSL documentation here: https://www.openssl.org/docs/manmaster/man3/SSL_CTX_set_cipher_list.html