secure your wordpress site Watch out form submissions. You can useRegexp to process the information from forms. You can even define preloaded variables as type data in the kind of checkboxes, radiobuttons etc..
No software system is immune to bugs and vulnerabilities. Security holes will be found and guys will do their best to exploit them. Keeping your software up-to-date is a good way to stave off attacks, because software original site vendors will fix their products once security holes are found.
For me it's a WordPress plugin. They are drop dead simple to set up, have all the functions you need for a task like this, and are relatively inexpensive, especially when compared to having to hire someone to have this done for you.
You can make a firewall that blocks hackers from infiltrating your own blogs. From coming to your own files, the find more firewall prevents the hacker. You also have to have updated version of Apache. Upgrade your PHP as well. It is important that your system is always his explanation full of upgrades.
However, I advise that you install the Login LockDown plugin rather than any.htaccess controls. Login requests will be ceased by that from being allowed from a for an hour or so after three failed login attempts. You can access your admin cell while from your workplace, and yet you still have protection against hackers if you accomplish that.