Cerberus Ftp Server 'link' [BEST]
Where Cerberus excels is the balance between enterprise-grade security and Windows admin familiarity. It is neither the cheapest nor the most feature-packed, but it is arguably the most reliable Windows-native MFT server on the market.
Common fixes: If users complain of "Connection timeout," check the Windows firewall (allow ports 21, 22, 990, plus passive port range 50000-51000). If FTPS fails, ensure the "Require TLS session resumption" setting matches the client's capabilities. cerberus ftp server