FTP Client Cannot Be Logged In to and Error Message "530 Authentication failed" Is Displayed

Hello, everyone!

Do you know how to solve the FTP client can't be logged issue? Don't worry, the post will share with you!

Symptom

In the cluster in security model, a login failure occurs when you log in to the FTP server using the correct username and password. The FTP server returns the error message "530 Authentication failed".

Possible Causes

• HDFS fault

  The FTP server will be suspended for a short period if the HDFS is faulty. If this occurs, no thread in the thread pool can respond to the login request from the client and no result will be returned.

• Ldap fault

  The authentication of the FTP server depends on the Ldap service. The authentication fails if the Ldap service is faulty.

• sssd service exception

  The authentication of the FTP server requires a check on the group to which the user belongs and this check depends on the sssd service.

Troubleshooting Method

1. Check the HDFS service status.

2. Check the Ldap service status.

3. Run the id command to check the group to which the user belongs.

Procedure

• Log in to the FusionInsight Manager portal.

• Click Alarms and check whether the alarm message "ALM-14000 Unavailable HDFS service" exists on the alarm page.
  

  • If yes, handle the alarm according to the alarm help.

  • If no, go to 3
    

• Check whether the alarm message "ALM-25000 Unavailable Ldap service" exists on the alarm page.
  

  • If yes, handle the alarm according to the alarm help.

  • If no, go to 4
    

• Use PuTTY to log in to the faulty FTP server as user root, and run the following command to switch to user omm:
  su - omm
  NOTE: Ensure that the following operations are performed as user omm.
  

• Run the following command:
  id -GnUsername
  

• Check whether the group to which the user belongs exists in the command output.
  

  • If yes, contact technical support.

  • If no, go to 7
    

• Wait 10 minutes for the sssd service to synchronize user data and then log in to the FTP client again to check whether the login is successful.
  

  • If yes, no further action is required.

  • If no, contact technical support.

That's all, thank!