Netcat command cheatsheet

file.md

Netcat cheatsheet

• Netcat listening on port 567/TCP:

$ nc -l 567

• Connecting to that port from another machine:

$ nc 1.2.3.4 5676

• To pipe a text file to the listener:

$ cat infile | nc 1.2.3.4 567 -q 10

• To have the listener save a received text file:

$ nc -l -p 567 > textfile

• To transfer a directory, first at the receiving end set up:

$ nc -l -p 678 | tar xvfpz

• Then send the directory:

$ tar zcfp - /path/to/directory | nc -w 3 1.2.3.4 678

• To send a message to your syslog server (the <0> means emerg):

$ echo '<0>message' | nc -w 1 -u syslogger 514

• Setting up a remote shell listener:

$ nc -v -e '/bin/bash' -l -p 1234 -t

or

$ nc l p 1234 e "c:\windows\system32\cmd.exe"

Then telnet to port 1234 from elsewhere to get the shell.

• Using netcat to make an HTTP request:

$ echo -e "GET http://www.google.com HTTP/1.0nn" | nc -w 5 www.google.com 80

• Making a one-page webserver; this will feed homepage.txt to all comers:

$ cat homepage.txt | nc -v -l -p 80

and if you want to create an tty for made an text communication by tty share:

cat /dev/tty | nc LISTENER_IP 4444

nc -v -l -p 4444