nc

Netcat is a versatile utility for redirecting IO into a network stream. More information: https://manned.org/man/nc.1.

• Start a listener on the specified TCP port and send a file into it:
  nc -l -p {{port}} < {{filename}}
• Connect to a target listener on the specified port and receive a file from it:
  nc {{host}} {{port}} > {{received_filename}}
• Scan the open TCP ports of a specified host:
  nc -v -z -w {{timeout_in_seconds}} {{host}} {{start_port}}-{{end_port}}
• Start a listener on the specified TCP port and provide your local shell access to the connected party (this is dangerous and can be abused):
  nc -l -p {{port}} -e {{shell_executable}}
• Connect to a target listener and provide your local shell access to the remote party (this is dangerous and can be abused):
  nc {{host}} {{port}} -e {{shell_executable}}
• Act as a proxy and forward data from a local TCP port to the given remote host:
  nc -l -p {{local_port}} | nc {{host}} {{remote_port}}
• Send an HTTP GET request:
  echo -e "GET / HTTP/1.1\nHost: {{host}}\n\n" | nc {{host}} 80