Conexao SSH

import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;

public class CTestDriver {

    private static void doSshTunnel(String strSshUser, String strSshPassword, String strSshHost, int nSshPort, String strRemoteHost, int nLocalPort, int nRemotePort) throws JSchException {
        final JSch jsch = new JSch();
        Session session = jsch.getSession(strSshUser, strSshHost, 22);
        session.setPassword(strSshPassword);

        final Properties config = new Properties();
        config.put("StrictHostKeyChecking", "no");
        session.setConfig(config);

        session.connect();
        session.setPortForwardingL(nLocalPort, strRemoteHost, nRemotePort);
        System.out.println("sessão:");
        System.out.println(session.isConnected());
    }

    public static void main(String[] args) {
        try {
            String strSshUser = "xxxx";                  // SSH loging username
            String strSshPassword = "xxxxx";                   // SSH login password
            String strSshHost = "xxxxx";          // hostname or ip or SSH server
            int nSshPort = 22;                                    // remote SSH host port number
            String strRemoteHost = "xxxxxx";  // hostname or ip of your database server
            int nLocalPort = 5432;                                // local port number use to bind SSH tunnel
            int nRemotePort = 5432;                               // remote port number of your database
            String strDbUser = "xxxx";                    // database loging username
            String strDbPassword = "xxxxxx";                    // database login password

            CTestDriver.doSshTunnel(strSshUser, strSshPassword, strSshHost, nSshPort, strRemoteHost, nLocalPort, nRemotePort);

            Class.forName("org.postgresql.Driver");
            Connection con = DriverManager.getConnection("jdbc:postgresql://xxxxxx:5432/exemplo_tabela", strDbUser, strDbPassword);
            con.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            System.exit(0);
        }
    }
}

org.postgresql.util.PSQLException: Conexão negada. Verifique se o nome da máquina e a porta estão corretos e se o postmaster está aceitando conexões TCP/IP.
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:215)
	at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:64)
	at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:144)
	at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
	at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21)
	at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:31)
	at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
	at org.postgresql.Driver.makeConnection(Driver.java:410)
	at org.postgresql.Driver.connect(Driver.java:280)
	at java.sql.DriverManager.getConnection(DriverManager.java:571)
	at java.sql.DriverManager.getConnection(DriverManager.java:215)
	at CTestDriver.main(CTestDriver.java:51)
Caused by: java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:579)
	at org.postgresql.core.PGStream.<init>(PGStream.java:61)
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:109)
	... 11 more