How to fix an error “421”: too many connections from this IP

In this tutorial I will show you how to fix an “421”: too many connections from this IP.

Client probably will get this error when connecting from client to his account.

You can resolve this error by editing the FileZilla settings, follow the below steps:

In FileZilla

File -> Site manager -> Transfer Settings -> check “Limit number of simultaneous connections” -> set it to “1”

You can also check the below settings in the ftp server configuration file:

# Maximum number of simultaneous users

MaxClientsNumber 50

# Maximum number of sim clients with the same IP address

MaxClientsPerIP 8
If the FTP server is pure-ftp then the configuration file must be >> /etc/pure-ftpd.conf

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