Creating Nginx server in local setup. *Versions we use : * *nginx version:* nginx/1.18.0 (Ubuntu) *OpenSSL* 1.1.1f 31 Mar 2020 *OS Version * No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal *From Nginx server error log : * 2021/03/05 13:56:19 [crit] 82641#82641: *5 SSL_do_handshake() failed (SSL: error:14201044:SSL routines:tls_choose_sigalg:internal error) while SSL handshaking, client: 10.201.35.201, server: 0.0.0.0:443 We are able to see client hello packet from client & server send [Alert] internal error as response to client instead of server hello. SSL handshake is failing here. Please let me know any changes needed in nginx cipher config. Coz, from client side DUT is trying to initiate connection to server and server declining it.