I have used QSslServer and passed the QSslCongifuration::defaultSslConfiguration() value to use it as the configuration data. Seems pretty easy in that respect. The default SSL configuration consists of: no local certificate and no private key protocol SecureProtocols the system's default CA certificate list the cipher list equal to the list of the SSL libraries' supported SSL ciphers that are 128 bits or more Another option is QSslConfiguration::defaultDtlsConfiguration() You have full control over certs, keys, etc. in the QSslConfiguration object. Just depends on how detailed you need to get with it. Usually in my case it's a "same host" sort of deal so I just use the default config.

@Dooms said: sslConfiguration You don't seem to have actually associated the sslConfiguration object with the QSslSocket object. You can set the cert/key files directly on the QSslSocket if that helps simplify your code for testing...

Please this code from me where I did exactly this: https://github.com/cybercatalyst/qtwebserver/blob/master/tcp/tcpmultithreadedserver.cpp#L141 void MultithreadedServer::setDefaultSslConfiguration() { // Set a default SSL configuration just to have it running out of the // box. Only for development purposes, never distribute an application // that relies on SSL with the default configuration set. You can // generate your own key and self-signed certificate: // // $ openssl req -x509 -newkey rsa:2048 -keyout server.key -nodes -days 365 -out server.crt QSslConfiguration sslConfiguration; QByteArray defaultKey = "-----BEGIN PRIVATE KEY-----\n" "MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDQdRrom1g/MsJh\n" "bfwVBZH+oxuGeIBO3jeNWs2bjpDmjtEtMz66LfFVrjuggt0UeNFb1Ve3tYIVq4Wj\n" "gmHYUOB44KCzVqJrd1mZdDKukdvoalJyh5f5/kqLdNGzrfjl5fmtK4jy76xM0oV4\n" "aZlj8eC4+odrS9HLHfBylDIeSXPWtThFw02IGiQALbtW8cqHSOXhucPAwiNFELVd\n" "jjFLa0buQSWq3WSZnroLwOXxfd2dtIoDIn319wTRFPAHWQDqlIuvefYvNzel65yY\n" "ZwoomIOrcxfN7IczLxkryD1uZpr4u2aWpHpz+mB7WXhPW82H6qT205e25iDbiZUQ\n" "+2UJWBHBAgMBAAECggEBAKF7Fe066ZGLcKio2q4uMnpfP+NbVYnC+qW1wbDPL9Bq\n" "sf+hwuXW0SzeW7JrrXc+YHATRHA7WxoOVOflCIbZoAoDeHl0kz1Mp0wIh3pT41aX\n" "hmbSQxiVtIlzZT8bdcQh8tgC8YO/xml8a4hrxTd3F+4zpNOpWEtQVgNsaaasn9+h\n" "/I/8uQ6oYkNISbnrs7u2fkFAw2/RbyZ6E2Dr9fMiDVUSa5ppFFHjfkgzbGA56Mtg\n" "0DdpxWMhICVMwlTI23zmjIAssyJG6xfCQfll9XbsiPAx9/uwAMIFPaUaWBzEUmhh\n" "L+/7hESQ7DGIfKxUqtiyvT53EuupxUxkcr0useZY5UECgYEA6wis5xcEo4eBk5o4\n" "IYcdZ93LrgwKtWj6e50sVs4NgCgsDWbH99IhNIxwQnCJ02O/aacbFV0d+jB9Jh+M\n" "NKTmqDxoe+EY2WJ+sR/YZ9VZwoHFwqubL1BzroX8FBN363tjicfFA+o3bSb4OXDC\n" "PINFzSLH8cLhFOo3UFiZf9I9ZZcCgYEA4w2FDGzhnpZPToiT/nwf55Ze2lJsPWlP\n" "8XydHoIWDIbUd1LnxBnoGZF1pefexoIy8zesGBfjHC7t6tC/4zy2oqECiP6ESACN\n" "8yhSDG+iegTU59LOk+blserR52c2vNGOR7RFbAyZeg3XXwlvQOpaquIP6tc7vkv1\n" "FijDcWm3nmcCgYAUAu0Vz/PpKIRz2NGmqSZrzYqmCwhuYb3SAJPh4DFuE/2MNpAY\n" "HaAOJVb5kTNq+Dc3+65mp0MCJlbBhDYf1Vp+QIZ05bmD6Mr4sclvLc8yrHH2HT5d\n" "TPBMj8PiwbWYKy1ScdvodWy6snK4EU24cUTkLm3vu7QGX9rN0H1hULlBiQKBgQC5\n" "rgW/ao98HJoQtFqrBCEnR+6cBkmkUypgZzMqjuGvLtg0GOWWlkUcG7uliKDDoBhA\n" "lKe1MFu3YZ2JqVszXyRQjPHAzLurEmEDmFa4+tZZiPf/+YKcq3fubwVngx3dflYn\n" "x4H6YbdlfEpD2zhTUxQAqUyxFYEzF3T/wShL6FOUQwKBgA2qSGUvxHcyWw8jnQ2g\n" "BbwtU75LCvTrSuIQ8DJIVt5+W9iseNi+q51w6hTAUleJ+4X7RDrSisQucbDAY+Fg\n" "Tyz0YVk4+WR0G7ZYAjLJBe7KpzpDZ4mI8yhfYBMhH+Rtkzk96ECezEve8L3llUqD\n" "s7+8TR6cFYhHQQH3DQ5BKdt0\n" "-----END PRIVATE KEY-----"; QByteArray defaultCertificate = "-----BEGIN CERTIFICATE-----\n" "MIIDhzCCAm+gAwIBAgIJAP9LmloP2P0tMA0GCSqGSIb3DQEBCwUAMFoxCzAJBgNV\n" "BAYTAkRFMRMwEQYDVQQIDApTb21lLVN0YXRlMSAwHgYDVQQKDBdRdFdlYlNlcnZl\n" "ciBEZXZlbG9wbWVudDEUMBIGA1UEAwwLRGV2ZWxvcG1lbnQwHhcNMTUwNDIxMDYw\n" "MTE4WhcNNDUwNDEzMDYwMTE4WjBaMQswCQYDVQQGEwJERTETMBEGA1UECAwKU29t\n" "ZS1TdGF0ZTEgMB4GA1UECgwXUXRXZWJTZXJ2ZXIgRGV2ZWxvcG1lbnQxFDASBgNV\n" "BAMMC0RldmVsb3BtZW50MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA\n" "0HUa6JtYPzLCYW38FQWR/qMbhniATt43jVrNm46Q5o7RLTM+ui3xVa47oILdFHjR\n" "W9VXt7WCFauFo4Jh2FDgeOCgs1aia3dZmXQyrpHb6GpScoeX+f5Ki3TRs6345eX5\n" "rSuI8u+sTNKFeGmZY/HguPqHa0vRyx3wcpQyHklz1rU4RcNNiBokAC27VvHKh0jl\n" "4bnDwMIjRRC1XY4xS2tG7kElqt1kmZ66C8Dl8X3dnbSKAyJ99fcE0RTwB1kA6pSL\n" "r3n2Lzc3peucmGcKKJiDq3MXzeyHMy8ZK8g9bmaa+LtmlqR6c/pge1l4T1vNh+qk\n" "9tOXtuYg24mVEPtlCVgRwQIDAQABo1AwTjAdBgNVHQ4EFgQUm4DLVsXhMy8J7Us4\n" "QoTdTgVS9CEwHwYDVR0jBBgwFoAUm4DLVsXhMy8J7Us4QoTdTgVS9CEwDAYDVR0T\n" "BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAQEAmxPOPLbq0EBBWrboNfGtD1OTnchy\n" "kBlhrSG+2gLNS3lfiphOZ+qtUGNTgewAk+nR5sraw4uFG8+6oQmNFS35zlbzWhgC\n" "dveQaT4CNtXCpAevRCbhhuDxzU0W0Dtenf3xFBC2wUWbAwxGZuklyA5ohl9+1By7\n" "YG5dPYYsgoeQl9t5yg5orh39kcrrz/exNlPH71qZO6QrPLlaRs0q4S4Yj33hgm/1\n" "XAILf9ZtcTElTRhSHC81bZz2HG84nP39WJCe4hH081cdkAMm7W2fzPTzHUWWRW34\n" "PMB0Ipp7R7CrztyxyaaDo1S3ozEpqvVT0KI65dWLt8ZsggcKxP6P5aeCBQ==\n" "-----END CERTIFICATE-----"; QSslKey sslKey(defaultKey, QSsl::Rsa); sslConfiguration.setPrivateKey(sslKey); QSslCertificate sslCertificate(defaultCertificate); sslConfiguration.setLocalCertificate(sslCertificate); sslConfiguration.setProtocol(QSsl::AnyProtocol); setSslConfiguration(sslConfiguration); }