Hallo, Leute, Das Problem hat sich gelöst! Eine Mitarbeiterin vom Plesk Support konnte mir helfen. Damit sich der nächste mit diesem Problem nicht so lange den Kopf zerbrechen muss, hier die Lösung:
The issue is related to some blacklisted cipher suites enabled on the server. See output of https://www.ssllabs.com/ssltest. Server negotiated HTTP/2 with blacklisted suite. It means that browsers was not able to connect by http2/TLS 1.2 using some cipher suite. It requires to disable/modify some of them. The http/2 protocol requires TLS 1.2 encryption with mandatory TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 cipher enabled. And connection using another cipher suite will be resulted in SSL handshake error. Generally the issue is that browser tries to connect using some blacklisted cipher suite, that is why it does not show pages. So that is why it is necessary to enable TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 cipher that it is used for http2/TLS 1.2 connection. Just modify "ssl_ciphers" directive in "/etc/nginx/conf.d/ssl.conf" file. After that, recreate domain configuration files using the following command: # /usr/local/psa/admin/bin/httpdmng --reconfigure-all Viele Grüße aus Köln Julia --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
