FTP
Nmap discovered a FTP server on the target port 21
The running service is Microsoft ftpd
┌──(kali㉿kali)-[~/PEN-200/PG_PRACTICE/billyboss]
└─$ ftp $IP
Connected to 192.168.148.61.
220 Microsoft FTP Service
Name (192.168.148.61:kali): ftp
534 Policy requires SSL.
ftp: Login failed
ftp> Besides identifying if the target FTP server allows null session, it requires SSL