s_client(1ssl) on Linux
The text 4af78a945301, as Debian 11 (Bullseye) shipped it.
SSL/TLS client program
Flags it lists
-
-4 -
-6 -
-CAfile -
-CApath -
-alpn -
-async -
-attime -
-auth_level -
-bind -
-brief -
-bugs -
-build_chain -
-cert -
-cert_chain -
-certform -
-chainCAfile -
-chainCApath -
-check_ss_sig -
-cipher -
-ciphersuites -
-comp -
-connect -
-crl_check -
-crl_check_all -
-crlf -
-ct -
-ctlogfile -
-curves -
-dane_ee_no_namechecks -
-dane_tlsa_domain -
-dane_tlsa_rrdata -
-debug -
-dtls -
-dtls1 -
-dtls1_2 -
-early_data -
-enable_pha -
-engine -
-explicit_policy -
-extended_crl -
-fallback_scsv -
-help -
-ign_eof -
-ignore_critical -
-inhibit_any -
-inhibit_map -
-key -
-keyform -
-keylogfile -
-max_pipelines -
-max_send_frag -
-msg -
-msgfile -
-name -
-nameopt -
-nbio -
-nbio_test -
-nextprotoneg -
-no-CAfile -
-no-CApath -
-no_alt_chains -
-no_check_time -
-no_comp -
-no_ign_eof -
-no_ssl3 -
-no_ticket -
-no_tls1 -
-no_tls1_1 -
-no_tls1_2 -
-no_tls1_3 -
-noct -
-noservername -
-partial_chain -
-pass -
-policy -
-policy_check -
-policy_print -
-prexit -
-proxy -
-psk -
-psk_identity -
-psk_session -
-purpose -
-quiet -
-rand -
-read_buf -
-reconnect -
-requestCAfile -
-sctp -
-sctp_label_bug -
-serverinfo -
-servername -
-sess_in -
-sess_out -
-showcerts -
-sigalgs -
-split_send_frag -
-ssl3 -
-starttls -
-state -
-status -
-suiteB_128 -
-suiteB_128_only -
-suiteB_192 -
-tls1 -
-tls1_1 -
-tls1_2 -
-tls1_3 -
-tlsextdebug -
-trace -
-trusted_first -
-unix -
-use_deltas -
-verify -
-verify_depth -
-verify_email -
-verify_hostname -
-verify_ip -
-verify_name -
-verify_return_error -
-x509_strict -
-xcert -
-xcertform -
-xchain -
-xchain_build -
-xkey -
-xkeyform -
-xmpphost