Instructions for setting up an OpenSSL server for use with DTLSClientTest

Download and Install OpenSSL (exercise for the reader)
Unpack to folder and add ${GNUTLS_HOME}/bin to PATH
Make a working folder somewhere and copy the x509-*.pem from this link to there.

Go to working folder and start OpenSSL server:

TLS:

    openssl s_server -accept 5556 -debug -msg -state -tls1_1 -www -CAfile x509-ca.pem -cert x509-server.pem -key x509-server-key.pem

DTLS:

    openssl s_server -accept 5556 -mtu 1500 -debug -msg -state -dtls1 -CAfile x509-ca.pem -cert x509-server.pem -key x509-server-key.pem

NOTE: This is mainly of use to test the handshake. There doesn't appear to be an 'echo server' option with DTLS, but it will print to stdout anything you send it, and lines you type into stdin (at the server) will be sent to the client.