On the client-side, this option in the jboss-ejb-client.properties does the trick :
remote.connection.default.connect.options.org.xnio.Options.SSL_ENABLED_CIPHER_SUITES=TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,SSL_RSA_WITH_3DES_EDE_CBC_SHA
If i could find an equivalent on the server side...