[ https://issues.jboss.org/browse/ISPN-6899?page=com.atlassian.jira.plugin.... ] Sebastian Łaskawiec commented on ISPN-6899: ------------------------------------------- RFC Highlights: * Allows supporting multiple application on the same TCP/UDP port * During the handshake the client sends a list of supported protocols (in client TLS Hello) and the server chooses the protocol and sends it back (server Hello). {noformat} Client Server ClientHello --------> ServerHello (ALPN extension & (ALPN extension & list of protocols) selected protocol) Certificate* ServerKeyExchange* CertificateRequest* <-------- ServerHelloDone Certificate* ClientKeyExchange CertificateVerify* [ChangeCipherSpec] Finished --------> [ChangeCipherSpec] <-------- Finished Application Data <-------> Application Data {noformat} * The server should pick the most highly preferred protocol and shall not respond with different protocol than supplied by the client. * ALPN effectively deprecates NPN -- This message was sent by Atlassian JIRA (v6.4.11#64026)