Solved – Error: 421 Sorry, cleartext sessions are not accepted on this server

The error reports because the FTP SSL encryption settings are incorrect while connection.

Please use following settings into your FTP client as (Options in Filezilla)

Main >> Service Configuration >> FTP Server Configuration TLS Encryption Support >> “optional”


Host: domain name or server Ip
Port : 21
Server Type : FTPES -FTP over explicit TLS/SSL
Enable the passive port range for Pure-FTPd
For that you need to modify FTP configuration file vim /etc/pure-ftpd.conf configuration file
Enable the passive port range as PassivePortRange 30000 65000 then Save the pure-ftpd.conf file and restart FTP service. Also enable the passive port range into server firewall


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