I think you should load the legacy provider. The default provider doesn't implement RC4. On Fri, Sep 6, 2024 at 8:04 PM 'Ladd, Watson' via openssl-users <openssl-users@xxxxxxxxxxx> wrote: > > Dear users, > > > I have been struggling to sort out what compile flags and arguments are required to get s_client from OpenSSL 3.1.7 to connect to a server with only RC4 enabled. I thought ./Configure enable-rc4 enable-weak-ssl-ciphers would be enough, and then ./openssl s_client -tls1 -cipher RC4. However this results in > > Call to SSL_CONF_cmd(-cipher, RC4) failed > > 004CA1EE01000000:error:0A0000B9:SSL routines:SSL_CTX_set_cipher_list:no cipher match:ssl/ssl_lib.c:2909 > > > which surprises me. > > > What am I missing? > > > Sincerely, > > Watson Ladd > > -- > You received this message because you are subscribed to the Google Groups "openssl-users" group. > To unsubscribe from this group and stop receiving emails from it, send an email to openssl-users+unsubscribe@xxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/a/openssl.org/d/msgid/openssl-users/1ee7e3f49d3f45d8a303722cd4967c16%40akamai.com. -- SY, Dmitry Belyavsky -- You received this message because you are subscribed to the Google Groups "openssl-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to openssl-users+unsubscribe@xxxxxxxxxxx. To view this discussion on the web visit https://groups.google.com/a/openssl.org/d/msgid/openssl-users/CADqLbzKyw4usEs_v1%2B7Ms4a3adx_k-HkQytjojN-CXGY0KX4nA%40mail.gmail.com.