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

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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 FTP .

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

In FileZilla

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

You can also check the below settings in the ftp 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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