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421 Sorry, cleartext sessions are not accepted on this server

421 Sorry, cleartext sessions are not accepted on this server.

Some times when you connect the webhost via FileZilla you may encounter this error message, because the FTP SSL encryption option will be incorrect.

Solution:-

Main >> Service Configuration >> FTP Server Configuration

TLS Encryption Support >> “optional”

On the FTP client use server type as

Host: domain or Ip

Port : 21

Server Type : FTPES -FTP over explicit TLS/SSL

Enable the passive port range for Pure-FTPd

vim /etc/pure-ftpd.conf configuration file

enable the passive port range

PassivePortRange 30000 65000

Save the pure-ftpd.conf file and restart FTP service.

Enable the passive ports range in your server firewall
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Reference : http://docs.cpanel.net/twiki/bin/view/AllDocumentation/WHMDocs/FTPPassiveMode