How to connect to tlsv1.3 tutorial openssl wireshark HD

Reference: https://8gwifi.org/docs/tlsv13.jsp TLS stands for Transport Layer Security and is the successor to SSL (Secure Sockets Layer). TLS allows client/server applications to communicate over the Internet in a way that is designed to prevent eavesdropping, tampering, and message forgery. This write-up mostly focus on TLSv 1.3. TLS 1.3 was defined in RFC 8446 in August 2018. It is based on the earlier TLS 1.2 specification. Major Differences from TLS 1.2 From the Wireshark packet capture, its clearly visible the TLSv.1.3, the number of TLS Handshake packets is being reduced this offer better speed in TLS v1.3 , and some of the major changes from TLS1.2 as follows TLS 1.3 Handshake TLSv1.3 Ciphersuites openssl Start the TLSv1.3 server openssl s_server -accept 443 -tls1_3 -ciphersuites TLS_AES_256_GCM_SHA384 -key key.pem -cert cert.pem Openssl Connect to TLSv1.3 openssl s_client -connect 127.0.0.1:443 TLSv1.3 server with Preshared Key PSK=b2c9b9f57ef2fbbba8b624070b301d7f278f1b39c352d5fa849f85a3e7a3f77b openssl s_server -accept 443 -tls1_3 -ciphersuites TLS_AES_256_GCM_SHA384 -key key.pem -cert cert.pem -psk $PSK Connect the TLSv1.3 server with same PSK PSK=b2c9b9f57ef2fbbba8b624070b301d7f278f1b39c352d5fa849f85a3e7a3f77b openssl s_client -connect 127.0.0.1:443 -tls1_3 -psk $PSK