Tool: Netcat

Netcat is a computer networking utility for reading from and writing to network connections using TCP or UDP.

Objective: Learn netcat tool by doing the following activities:

1. Use netcat to listen on TCP port 4000 of the localhost. Open a new tab and use netcat to connect to the listening instance.
2. Use netcat to listen on UDP port 4000 of the localhost. Open a new tab and use netcat to connect to the listening instance.
3. Use netcat to listen on port 4000 of the localhost and provide bash access to any session connecting to it. Open a new tab and use netcat to connect to the listening instance. 
4. Use netcat to listen on port 4000 of the localhost and log the communication exchange into a file.  Open a new tab and use netcat to connect to the listening instance.  
5. Use netcat to listen on port 4000 of the localhost. Open a new tab and use netcat to connect to the listening instance. Transfer a dummy file from connecting instance t listening instance.
6. Use netcat as a port scanner to scan the first 1000 ports of the other two machines present on the network and discover their open ports.
7. Connect to telnet service running on a remote machine with netcat using the following credentials.
           - Username: administrator
           - Password: 1q2w3e4r
8. Connect to a web server using netcat and fetch the index page. 
9. Create a dummy web server using netcat. Use curl command to interact with this dummy web server.
   
   

Instructions:

• This lab is dedicated to you! No other users are on this network :) 
  
• Your machine has an interface with IP address 192.X.Y.Z. Run "ip addr" to know the values of X and Y.
  
• The target server should be located at the IP address 192.X.Y.3. 
• Do not attack the gateway located at IP address 192.X.Y.1