im researching a software that apparently accept TLSv1, but cant get pass the TLS handshake My setup is a windows VM connected to my host (windows too), with this particular program acting as client, and me acting like a server with python 3.11. The setup for TLS is this: import ssl import socket import time import binascii context=ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER) context.options |=(ssl.OP_NO_TLSv1_2|ssl.OP_NO_TLSv1_3) context.maximu_version = ssl.TLSVersion.TLSv1_1 context.verify_mode=ssl.CERT_NONE #context.load_verify_locations("cert.pem") context.load_cert_chain(certfile="cert.pem" ,keyfile="key.pem") context.set_ciphers('ECDHE-RSA-AES128-SHA@SECLEVEL=0') serv=socket.socket(socket.AF_INET,socket.SOCK_STREAM) serv=context.wrap_socket(serv) serv.bind((ip,8080)) serv.listen(5) the certificate was created with the following command: openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 600 -nodes (dont think it matters, but i should mention the program accept self signed certificates) i also have wireshark intercepting traffic and i get 2 different behaviors: tcp connection is established, and python sends a alert: close notify (15030300020250) and tcp connection is closed tcp connection is establised, i get the clientHello version 1 from client (version= 0x0301), but python reset the tcp connection so my question is, how can i get this working? any solutions? if i can establish a TLS v1.1 connection or lower im good last thing i tried was this: https://gist.github.com/vkosuri/5fd5d6b79d46700eb754aa0d18edbe62 but still cant get a TLS connection. just want to get get a TLS 1.1 connection or lower working Continue reading...