Troubleshooting FileZilla Error Logs

In this article, we will cover the basics of troubleshooting FileZilla error logs.

• 530 Login Authentication Failed
• 500 Unrecognized Command
• EAI_NONAME – Neither nodename nor servname provided, or not known
• 421 Too Many Connections

Response: 530 Login authentication failed

Response: 530 Login authentication failed
 Error: Critical error
 Error:  Could not connect to server

This error is caused by an incorrect username, or password.

• Check your FTP username/password for spelling errors.
• Reset your FTP password

Response: 500 unrecognized command

Response: 500 unrecognized command
 Error:  Could not connect to server

In my tests, this error is caused by an incorrect port setting.

• Check that you are using port 21.

Status: Connection attempt failed with “EAI_NONAME – Neither nodename nor servname provided, or not known”.

Status: Connection attempt failed with "EAI_NONAME - Neither nodename nor servname provided, or not known".
 Error:  Could not connect to server

This error occurs when you enter a hostname that does not exist. There are several things you can do to fix this problem.

• Review the hostname for spelling mistakes.
• Make sure you registered the Domain
• Ensure the domain is pointed to InMotion Hosting.
• Rule out propagation.
• Use the Shared SSL instead.

We also have some additional troubleshooting information in our community forum: Connection Attempt Failed With “eai_noname – Neither Nodename nor Servname Provided, or Not Known”

421 Too Many Connections

If you are getting this error, check out our full guide on 421 Too many connections.

Congratulations, now you know how to troubleshoot error logs in FileZilla!