A Tcp proxy Tool for Tcp interception and packet editing on the fly

The Tcp Catcher is a proxy Tcp Catcher Tool for Tcp interception and packet editing on the fly.

The tool is great and would be helpful in further POC tasks.

Hands-On Steps:

1. Download and Install a recent Java Runtime Environment

        http://java.com/en/download/manual.jsp

2. Download TcpCatcher version 2.27.2

        (No installation required, it is packaged as standalone executable jar file)

        http://www.tcpcatcher.fr/download_jar.php

3. Open TcpCatcher with java

        java -jar TcpCatcher.jar -Xmx512m

4. Mark it as HTTP or Tcp Proxy (in e.g.)

        

 

5. a. Increase Maximum history table size

        b. Apply Settings and Start

 

6. Use Catch Mode Off to passthrough traffic vis TcpCatcher proxy.

7. Use Catch Mode On to intercept packet for troubleshooting.

        The packet field could be edited on the fly and then send. This is great handle for the user.