Why Can\'t I Connect to MySQL 4.1 Using Legacy Authentication?

Unable to Connect to MySQL 4.1 using Legacy Authentication

When attempting to connect to a MySQL database, you may encounter the error message "Connect Error (2000) mysqlnd cannot connect to MySQL 4.1 using old authentication." This issue stems from an obsolete password scheme utilized by MySQL versions prior to 4.1. Newer iterations of MySQL provide an option to employ these antiquated passwords, known to potentially lead to this connectivity problem.

Troubleshooting for MySQL Database Connection Issues

If your MySQL database is managed by a third-party provider, you may not have control over its configuration. However, if you have administrative access to the database:

1. Confirm Server Password Schema Settings:

Execute the MySQL query:

SHOW VARIABLES LIKE 'old_passwords'

• If the result is "old_passwords,Off," the server is not configured to use the legacy password schema by default.
• If the result is "old_passwords,On," legacy password entries in the user table may still exist, triggering the use of the outdated authentication method.

2. Check Password Length in 'mysql.user' Table:

Run the query:

SELECT `User`, `Host`, Length(`Password`) FROM mysql.user

• Legacy passwords have a length of 16 characters.
• Modern passwords have a length of 41 characters.

3. Update User Password and Configuration:

• Implement a password reset for the affected account using the query:

SET PASSWORD FOR 'User'@'Host'=PASSWORD('yourpassword');

• Refresh database privileges:

FLUSH Privileges;

• Verify that the password length in the 'mysql.user' table has changed to 41.

4. Refer to MySQL Documentation:

For additional information on resolving this issue, refer to the following MySQL documentation:

• [Old Client](http://dev.mysql.com/doc/refman/5.0/en/old-client.html)
• [Password Hashing](http://dev.mysql.com/doc/refman/5.0/en/password-hashing.html)
• [Set Password](http://dev.mysql.com/doc/refman/5.0/en/set-password.html)

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