TCP | Scripting and security

Crear una comunicación entre un cliente en PowerShell de Windows y un servidor en Node.js utilizando TCP/IP

02/06/201831/05/2018

Servidor en Node.js

var net = require('net');

var HOST = '127.0.0.1';
var PORT = 6969;

// Create a server instance, and chain the listen function to it
// The function passed to net.createServer() becomes the event handler for the 'connection' event
// The sock object the callback function receives UNIQUE for each connection
net.createServer(function(sock) {
    
    // We have a connection - a socket object is assigned to the connection automatically
    console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
    
    // Add a 'data' event handler to this instance of socket
    sock.on('data', function(data) {
        
        console.log('DATA ' + sock.remoteAddress + ': ' + data);
        // Write the data back to the socket, the client will receive it as data from the server
        sock.write('You said "' + data + '"');
        
    });
    
    // Add a 'close' event handler to this instance of socket
    sock.on('close', function(data) {
        console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);
    });
    
}).listen(PORT, HOST);

console.log('Server listening on ' + HOST +':'+ PORT);

var net = require('net');

var HOST = '127.0.0.1';

var PORT = 6969;

// Create a server instance, and chain the listen function to it

// The function passed to net.createServer() becomes the event handler for the 'connection' event

// The sock object the callback function receives UNIQUE for each connection

net.createServer(function(sock) {

// We have a connection - a socket object is assigned to the connection automatically

console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);

// Add a 'data' event handler to this instance of socket

sock.on('data', function(data) {

console.log('DATA ' + sock.remoteAddress + ': ' + data);

// Write the data back to the socket, the client will receive it as data from the server

sock.write('You said "' + data + '"');

});

// Add a 'close' event handler to this instance of socket

sock.on('close', function(data) {

console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);

});

}).listen(PORT, HOST);

console.log('Server listening on ' + HOST +':'+ PORT);

Cliente en PowerShell

##Client
$port=6969
$TcpClient=New-Object System.Net.Sockets.TcpClient([IPAddress]::Loopback, $port)

$GetStream = $TcpClient.GetStream()
$StreamWriter = New-Object System.IO.StreamWriter $GetStream

$positions='Hi'

$StreamWriter.Write($positions)

$StreamWriter.Dispose()
$GetStream.Dispose()
$TcpClient.Dispose()

##Client

$port=6969

$TcpClient=New-Object System.Net.Sockets.TcpClient([IPAddress]::Loopback, $port)

$GetStream = $TcpClient.GetStream()

$StreamWriter = New-Object System.IO.StreamWriter $GetStream

$positions='Hi'

$StreamWriter.Write($positions)

$StreamWriter.Dispose()

$GetStream.Dispose()

$TcpClient.Dispose()

Network PowerShell

Relación entre puertos TCP y procesos (construir un objeto con propiedades personalizadas)

03/05/201802/05/2018

Get-NetTCPConnection | Select-Object LocalAddress,LocalPort,OwningProcess,@{n='Nombre proceso';e={Get-Process -id ($_ | Select-Object -ExpandProperty OwningProcess) | Select-Object -ExpandProperty Name}}

1	Get-NetTCPConnection \| Select-Object LocalAddress,LocalPort,OwningProcess,@{n='Nombre proceso';e={Get-Process -id ($_ \| Select-Object -ExpandProperty OwningProcess) \| Select-Object -ExpandProperty Name}}

Java Network

Enviar una imagen entre un cliente y un servidor con Java (Sockets TCP)

29/01/201829/01/2018

Servidor

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;

public class Server
{
    public static void main(String[] args)
    {
        int port=2050;
        try
        {
            ServerSocket serverSocket = new ServerSocket(port);

            Socket clientSocket = serverSocket.accept();

            InputStream inputStream = clientSocket.getInputStream();

            System.out.println(inputStream);

            byte[] imageAr = new byte[62100];
            inputStream.read(imageAr);

                BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageAr));

            System.out.println("Received " + image.getHeight() + "x" + image.getWidth() + ": " + System.currentTimeMillis());
            ImageIO.write(image, "jpg", new File("C:\\Users\\juan\\Desktop\\recono\\coche2.png"));

            inputStream.close();
            clientSocket.close();
            serverSocket.close();
        }
        catch (UnknownHostException e){
            System.out.println(e);
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.*;

import java.net.*;

import java.nio.ByteBuffer;

public class Server

{

public static void main(String[] args)

{

int port=2050;

try

{

ServerSocket serverSocket = new ServerSocket(port);

Socket clientSocket = serverSocket.accept();

InputStream inputStream = clientSocket.getInputStream();

System.out.println(inputStream);

byte[] imageAr = new byte[62100];

inputStream.read(imageAr);

BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageAr));

System.out.println("Received " + image.getHeight() + "x" + image.getWidth() + ": " + System.currentTimeMillis());

ImageIO.write(image, "jpg", new File("C:\\Users\\juan\\Desktop\\recono\\coche2.png"));

inputStream.close();

clientSocket.close();

serverSocket.close();

}

catch (UnknownHostException e){

System.out.println(e);

} catch (IOException e) {

System.out.println(e);

}

Cliente

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;

public class Client
{
    public static void main(String[] args)
    {
        int port=2050;
        try
        {
            Socket clientSocket = new Socket("localhost",port);

            OutputStream outputStream = clientSocket.getOutputStream();

            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

            BufferedImage image = ImageIO.read(new File("C:\\Users\\juan\\Desktop\\recono\\coche.png"));
            ImageIO.write(image, "jpg", byteArrayOutputStream);

            byte[] size = ByteBuffer.allocate(4).putInt(byteArrayOutputStream.size()).array();
            System.out.println(byteArrayOutputStream.size());
            outputStream.write(byteArrayOutputStream.toByteArray());
            Thread.sleep(2000);

            outputStream.close();
            clientSocket.close();
        }
        catch (UnknownHostException e){
            System.out.println(e);
        }
        catch (IOException e) {
            System.out.println(e);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.*;

import java.net.*;

import java.nio.ByteBuffer;

public class Client

{

public static void main(String[] args)

{

int port=2050;

try

{

Socket clientSocket = new Socket("localhost",port);

OutputStream outputStream = clientSocket.getOutputStream();

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

BufferedImage image = ImageIO.read(new File("C:\\Users\\juan\\Desktop\\recono\\coche.png"));

ImageIO.write(image, "jpg", byteArrayOutputStream);

byte[] size = ByteBuffer.allocate(4).putInt(byteArrayOutputStream.size()).array();

System.out.println(byteArrayOutputStream.size());

outputStream.write(byteArrayOutputStream.toByteArray());

Thread.sleep(2000);

outputStream.close();

clientSocket.close();

}

catch (UnknownHostException e){

System.out.println(e);

}

catch (IOException e) {

System.out.println(e);

} catch (InterruptedException e) {

e.printStackTrace();

}

Java Network

Realizar conexiones con Java

27/12/201705/02/2018

Red Analizar direcciones IP para detectar puertos abiertos (versión 1) Analizar direcciones IP para detectar puertos abiertos (versión 2) TCP Comprobar si un puerto TCP está abierto Server and client (Sockets TCP) Multiserver and clients (Sockets TCP and threads) Enviar una imagen entre un cliente y un servidor con Java (Sockets TCP) Enviar mensajes constantemente entre cliente y servidor con Java UDP Server and client (Datagram Socket UDP) MulticastSocket (Datagram Socket UDP) URL Conectar con una URL en Java Conectar con una URL en Java cambiando el User-Agent Realizar petición HTTP mediante el método POST utilizando librerías de Apache

Network PowerShell

Comprobar constantemente si está abierto un puerto TCP

23/12/201728/12/2017

while(1)
{
    Get-NetTCPConnection | Select-Object LocalAddress,RemotePort,OwningProcess| Where-Object {$_.RemotePort -eq "443"}
    Start-Sleep -Seconds 5
    clear
}

while(1)

{

Get-NetTCPConnection | Select-Object LocalAddress,RemotePort,OwningProcess| Where-Object {$_.RemotePort -eq "443"}

Start-Sleep -Seconds 5

clear

}

Java

Curso de Java con ejemplos

01/12/201719/06/2019

Procesos Create operating system processes Create and destroy operating system processes Crear un proceso utilizando Runtime Crear un proceso utilizando ProcessBuilder Lanzar un programa del sistema operativo como argumento desde la línea de comandos Ejecutar y guardar el comando ‘arp’ utilizando ProcessBuilder Hilos Crear un hilo implementando el interfaz Runnable Crear un hilo heredando de la clase Thread Automatizar Obtener la posición del ratón en la pantalla con Java Ver la resolución de pantalla con Java Mover el ratón a una posición con Java Mover el ratón con duración a varias posiciones de la pantalla con Java Hacer clic en […]

Bash Memory Operating Systems PowerShell Processes

Analizar el rendimiento de Linux realizando una conexión SSH desde PowerShell en Windows

28/10/201722/10/2017

New-SSHSession -ComputerName 192.168.1.162 -Credential (Get-Credential)

#analizar.txt:
#uptime
#dmesg
#vmstat
#mpstat -P ALL
#pidstat
#iostat -xz
#free -m
#sar -n DEV
#sar -n TCP,ETCP
#ps

gc analizar.txt | %{
$_
$resultado=Invoke-SSHCommand -Index 0 $_
"---------------------------------------------------------------" | Out-File resultado.txt -Append
$resultado.Output | Out-File resultado.txt -Append
Start-Sleep -Seconds 5
}

New-SSHSession -ComputerName 192.168.1.162 -Credential (Get-Credential)

#analizar.txt:

#uptime

#dmesg

#vmstat

#mpstat -P ALL

#pidstat

#iostat -xz

#free -m

#sar -n DEV

#sar -n TCP,ETCP

#ps

gc analizar.txt | %{

$resultado=Invoke-SSHCommand -Index 0 $_

"---------------------------------------------------------------" | Out-File resultado.txt -Append

$resultado.Output | Out-File resultado.txt -Append

Start-Sleep -Seconds 5

}

Bash Network PowerShell

Crear una comunicación entre un cliente en PowerShell de Windows y un servidor en Bash de Linux utilizando TCP/IP

26/10/201722/10/2017

Bash

#Servidor
#Abrir el puerto 5010 para establecer comunicación
nc -l 5010

#Servidor

#Abrir el puerto 5010 para establecer comunicación

nc -l 5010

PowerShell

#Cliente
$ip=[IPAddress]"192.168.1.162"
$TcpClient=New-Object System.Net.Sockets.TcpClient($ip, "5010")
$mensaje=New-Object System.IO.StreamWriter $TcpClient.GetStream()
$mensaje.Write("hola----------")
$mensaje.Dispose()

#Cliente

$ip=[IPAddress]"192.168.1.162"

$TcpClient=New-Object System.Net.Sockets.TcpClient($ip, "5010")

$mensaje=New-Object System.IO.StreamWriter $TcpClient.GetStream()

$mensaje.Write("hola----------")

$mensaje.Dispose()

Bash Network PowerShell

Crear una comunicación entre un cliente en Bash de Linux y un servidor en PowerShell de Windows utilizando TCP/IP

18/10/201719/10/2017

PowerShell

#Server
$ip=[IPAddress]"0.0.0.0"
$TcpListener=New-Object System.Net.Sockets.TcpListener (New-Object System.Net.IPEndPoint($ip,"2052"))
$TcpListener.Start()

while($true)
{
$mensaje=(New-Object System.IO.StreamReader ($TcpListener.AcceptTcpClient().GetStream())).ReadLine()
$mensaje
}
$TcpListener.Stop()

#Server

$ip=[IPAddress]"0.0.0.0"

$TcpListener=New-Object System.Net.Sockets.TcpListener (New-Object System.Net.IPEndPoint($ip,"2052"))

$TcpListener.Start()

while($true)

{

$mensaje=(New-Object System.IO.StreamReader ($TcpListener.AcceptTcpClient().GetStream())).ReadLine()

$mensaje

}

$TcpListener.Stop()

Bash

#Enviar hola al servidor que tiene la IP 192.168.1.157 y el puerto 2052
echo "hola" > /dev/tcp/192.168.1.157/2052

1 2	#Enviar hola al servidor que tiene la IP 192.168.1.157 y el puerto 2052 echo "hola" > /dev/tcp/192.168.1.157/2052

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