How to Fix \'mysqlnd Cannot Connect to MySQL 4.1 Using the Old Insecure Authentication\' Error?

Resolving "mysqlnd Cannot Connect to MySQL 4.1 " Error

Encountering the error "mysqlnd cannot connect to MySQL 4.1 using the old insecure authentication" indicates that MySQL is configured for improved security. To resolve this issue:

1. Remove or Comment out old_passwords Configuration:

   • In my.cnf, locate the old_passwords setting and remove or comment it out by changing it to old_passwords = 0.

2. Restart MySQL:

   • After editing the configuration file, restart MySQL to apply the changes.

3. Update MySQL Passwords:

   • Access the MySQL database and execute the following query to determine which passwords are vulnerable:

     SELECT user, Length(`Password`) FROM `mysql`.`user`;

   • For passwords with a length of 16 characters, execute the following command to update each user:

     UPDATE mysql.user SET Password = PASSWORD('password') WHERE user = 'username';

4. Flush Privileges:

   • After updating all passwords, flush privileges by executing the following command:

     FLUSH PRIVILEGES;

5. Verify Connection:

   • Attempt to connect to MySQL again from your local machine. The error should now be resolved.

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