•
Upgrade WU-FTPD or ProFTPD
• Disable anonymouse if no needed
• Disable anonymouse upload function
if no needed
• Restrict access by TCP wrappers
• Implement restrictive file
permissions
• Add all administrative accounts
(such as root, daemon, sys, etc.) to the /etc/ftpusers
• Replacing FTP with SFTP or
SCP
•
Disable unused FTP servers completely
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