Primary tasks for hardening WordPress powered website:
- Make sure you are always updated with the latest version of WordPress.
- Minimizing the number of plugins you use (and deleting the ones you don’t use)
- Choosing passwords that are difficult to crack
- Protecting your WordPress using .htaccess
- Performing regular data backups
For hardening the security in wordpress powered website, you should follow the below url steps.
http://codex.wordpress.org/Hardening_WordPress
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