How to fix 421 Too many connections from this IP with FileZilla

Introduction

How to fix 421 Too many connections from this IP with FileZilla

Procedure

1. Launch FileZilla and click File -> Site Manager.
2. Under the Select Entry section, choose your site, then tap the Transfer Settings tab.
3. Tick the Limit number of simultaneous connections box and fill out the Maximum number of connections field with your preferred amount of connections.
4. Click OK to save the settings.
5. Reconnect and see if FTP error 421 is gone.