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    Import the server certificate into your truststore.

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Connection has been shutdown: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
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Connection has been shutdown: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificates does not conform to algorithm constraints
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Connection has been shutdown: javax.net.ssl.SSLException: java.net.SocketException: Connection reset
javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)	at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)	at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)	at sun.security.ssl.SSLSocketImpl.getSession(SSLSocketImpl.java:2267)	at com.example.SSLReverseEchoer.printSocketInfo(SSLReverseEchoer.java:94)	at com.example.SSLReverseEchoer.main(SSLReverseEchoer.java:49)