How to Fix 421 Too Many Connections (8) from this IP Error in FileZilla

How to Fix 421 Too Many Connections (8) from this IP Error in FileZilla

The main cause of 421 Too Many Connections (8) from this IP error in FileZilla is non-active (idle) FTP connections not being closed before opening new ones. This happens because shared hosting providers limit simultaneous FTP connections in order to prevent server overload. In this tutorial you will learn how to easily fix 421 Too Many Connections (8) from this IP error by applying correct settings in FileZilla FTP client and flushing idle connections in your hosting control panel.

421 Too Many Connections (8) from this IP Error in FileZilla

What you’ll need

Before you begin this guide, you’ll need the following:

  • FileZilla FTP Client
  • Access to your hosting account control panel

Step 1 – Fixing 421 Too Many Connections (8) from this IP error in FileZilla

First and recommended method to resolve this error is to limit simultaneous connections in your FTP client configuration. Steps listed below show how to properly configure FileZilla FTP client and set a maximum number of simultaneous connections:

  1. Launch FileZilla FTP Client.
  2. Click on File and open Site Manager.
    FileZilla File Manager Button
  3. Choose the site (1) for which you want to limit simultaneous connections and hit Transfer Settings (2) tab.
    FileZilla Transfer Settings Tab
  4. Select Limit number of simultaneous connections and enter a Maximum number of connections. A number of connections may vary depending on your hosting provider. If you are not sure how many simultaneous connections your hosting provider allows enter 8. But it is always recommended to contact your hosting support staff to find out the maximum limit.
    FileZilla Limit number of simultaneous connections
  5. Click OK button to save settings.

Step 2 – Flushing (Dropping) non-active connections in cPanel (optional)

If you use cPanel to manage your hosting account, you can easily drop non-active FTP connections and temporarily resolve 421 Too Many Connections from this IP error:

  1. Access cPanel and navigate to FTP Connections section.
    cPanel FTP Connections Section
  2. This cPanel section displays all FTP connections to your account. If you cannot see any connections, press Reload button to refresh the page. In order to drop idle connection press Disconnect button.
    cPanel Disconnect FTP Connections
  3. On a new window you will be asked for confirmation in order to drop FTP connection. Press Disconnect button again.
    cPanel Disconnect Confirmation
  4. Repeat the steps above for all idle FTP connections you want to close.


By finishing this tutorial, you have learned how to flush idle FTP connections in cPanel and properly configure FileZilla FTP client to prevent 421 Too many connections (8) from this IP error. If you want to find out more about FileZilla, see our comprehensive tutorial dedicated just for this FTP client.

The Author


Domantas G. / @domantas

Domantas leads the content and SEO teams forward with fresh ideas and out of the box approaches. Armed with extensive SEO and marketing knowledge, he aims to spread the word of Hostinger to every corner of the world. During his free time, Domantas likes to hone his web development skills and travel to exotic places.

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salman Reply

November 08, 2017

that really helped me thanks for the wonderfull article :)


Nick Reply

January 23, 2018

Thank you! It helped me a lot!


    Gediminas B.

    Replied on February 15, 2018

    Glad to hear it, Nick!


Carlos Reply

February 13, 2018

Brilliant. Saved my day.


Tanya Reply

March 11, 2018

Suuuuper helpful! Thank you!


    Domantas G.

    Replied on March 23, 2018

    Hey Tanya, Thanks!


Evagoras Reply

September 13, 2018

Perfect!! Thank You! Life Saver


Waren Reply

January 14, 2019

Simple yet effective, thanks for this wonder tips you really solve my problem.


Giovanni Reply

September 16, 2019

Thanks for this. You da man.


Timur Reply

September 28, 2019

Thanks! really helped

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