How can server administrators configure their servers to prevent unintentional 403 errors?

Server administrators can prevent unintentional 403 errors by ensuring correct default file and directory permissions (e.g., 644 for files, 755 for directories) are enforced. They should carefully review and test `.htaccess` files for any 'Deny From' rules or 'Options -Indexes' directives that might unintentionally block legitimate access. Regularly checking server error logs for patterns of 403 errors can help identify and resolve underlying configuration issues promptly. Implementing a robust default `index` file strategy (e.g., `DirectoryIndex index.php index.html`) is also crucial.