connection rejected by remote interface

/*<br />
 * To change this license header, choose License Headers in Project Properties.<br />
 * To change this template file, choose Tools | Templates<br />
 * and open the template in the editor.<br />
 */<br />
package br.com.sisvenda.acessobd;<br />
<br />
import java.sql.Connection;<br />
import java.sql.DriverManager;<br />
import java.sql.PreparedStatement;<br />
import java.sql.ResultSet;<br />
import java.sql.SQLException;<br />
<br />
/**<br />
 *<br />
 * @author Conforte<br />
 */<br />
public class AcessoFirebird {<br />
    Connection con;<br />
    PreparedStatement pstm;<br />
    ResultSet rs;<br />
    <br />
    public static void main(String args[]){<br />
        new AcessoFirebird();<br />
    }<br />
    <br />
    public AcessoFirebird(){<br />
      conectar();<br />
    }<br />
    <br />
    public Connection conectar(){<br />
        try {<br />
            Class.forName("org.firebirdsql.jdbc.FBDriver");<br />
            con = DriverManager.getConnection("jdbc:firebirdsql:localhost/3050:c:/TESTE.FDB", "sysdba", "masterkey");<br />
        } catch (ClassNotFoundException ex) {<br />
            ex.printStackTrace();<br />
            System.out.println("Não foi possível encontrar o Driver!");<br />
        } catch (SQLException ex) {<br />
            ex.printStackTrace();<br />
            System.out.println("Não foi possível conectar ao banco!");<br />
        }<br />
        return con;<br />
    }<br />
    <br />
    public void desconectar(){<br />
        try {<br />
            con.close();<br />
        } catch (SQLException ex) {<br />
            ex.printStackTrace();<br />
        }<br />
    }<br />
}<br />

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package br.com.sisvenda.acessobd;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 *
 * @author Conforte
 */
public class AcessoFirebird {
    Connection con;
    PreparedStatement pstm;
    ResultSet rs;
    
    public static void main(String args[]){
        new AcessoFirebird();
    }
    
    public AcessoFirebird(){
      conectar();
    }
    
    public Connection conectar(){
        try {
            Class.forName("org.firebirdsql.jdbc.FBDriver");
            con = DriverManager.getConnection("jdbc:firebirdsql:localhost/3050:c:/TESTE.FDB", "sysdba", "masterkey");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
            System.out.println("Não foi possível encontrar o Driver!");
        } catch (SQLException ex) {
            ex.printStackTrace();
            System.out.println("Não foi possível conectar ao banco!");
        }
        return con;
    }
    
    public void desconectar(){
        try {
            con.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package br.com.sisvenda.acessobd;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 *
 * @author Conforte
 */
public class AcessoFirebird {
    Connection con;
    PreparedStatement pstm;
    ResultSet rs;
    
    public static void main(String args[]){
        new AcessoFirebird();
    }
    
    public AcessoFirebird(){
      conectar();
    }
    
    public Connection conectar(){
        try {
            Class.forName("org.firebirdsql.jdbc.FBDriver");
            con = DriverManager.getConnection("jdbc:firebirdsql:localhost/3050:c:/TESTE.FDB", "sysdba", "masterkey");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
            System.out.println("Não foi possível encontrar o Driver!");
        } catch (SQLException ex) {
            ex.printStackTrace();
            System.out.println("Não foi possível conectar ao banco!");
        }
        return con;
    }
    
    public void desconectar(){
        try {
            con.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }
}