421 Too many connections (8) from this IP

If user is receiving an error similar to this:

421 Too many connections  from this IP

The client needs to change his FTP settings to limit the number of simultaneous connections.

If using Filezilla:

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

For others, some research needs to be done.

If anyone knows the maximum number of connections allowed, please post it.

Check

Here are some settings from the /etc/pure-ftpd.conf:

# Maximum number of simultaneous users

MaxClientsNumber 50

# Maximum number of sim clients with the same IP address

MaxClientsPerIP 8