Banner grabbing

More netcat commands

• Timeout on connect
  nc -w 3 192.168.1.1 80copy

  Set connection timeout to 3 seconds

• Listen on port
  nc -lvp 4444copy

  Start a netcat listener on port 4444

• Connect to host
  nc 192.168.1.1 80copy

  Open a TCP connection to host on port 80

• Port scanning
  nc -zv 192.168.1.1 20-80copy

  Scan ports 20-80 on a host (zero I/O mode)

• Transfer file (sender)
  nc -lvp 4444 < file.tar.gzcopy

  Send file to a remote listener

all 10 netcat commands →