FTP
ftp ftp://anonymous:anonymous@1.2.3.4
# passive
nxc ftp 1.2.3.4 -u'user' -p'pass'
wget -m --no-passive ftp://anonymous:anonymous@1.2.3.4
Fuzzing
/usr/share/patator/patator.py ftp_login host=TARGET user=root password=FILE0 0=./rockyou.txt
hydra -l user -P rockyou.txt -f 1.2.3.4 ftp