If a hacker is absolutely determined to get into your site they're probably going to succeed. But you can protect your WP installation from the mass bot hackers with a few common sense precautions.

Here are some steps you can take:

Firstly, make sure you keep your version of WordPress up to date.

In addition to that, I've changed my login name from admin to something else (long and complex), made sure my password is as strong as I can make it, I've put an extra layer of security around the wp-admin directory, created a blank index.html file to hide the plugins I'm using, and a few other bits and bobs.

There are a number of good plugins that will carry out those steps and continuously monitor your blog for security vulnerabilities. It's well worth installing and activating one of these, and make sure you keep it up to date too!

The risk increases in line with the number of users to whom you give access rights. I don't have guest bloggers but, if I did, I'd get them to send me the posts and let me put them up rather than give out user access rights. I also don't allow registration.

But there are some areas that people often overlook, and which allow hackers to get access to your Wordpress installation via your FTP details.

If you're not using SFTP (or Secure Shell Access if your hosting provider doesn't support SFTP) then your FTP login details are being transmitted across the Internet in clear every time you log on and upload/download stuff.

I back up my blog system files each week by copying everything back to my PC. Since this takes around an hour there's plenty of opportunity for someone to intercept my FTP details.

Also, of course, you could have spyware on your machine which would pick up your FTP logins from there. (Along with all your other logins!).

Make sure you include your entire PC environment when you're putting security in place - not just your WP installation.

In addition to all those WP specific precautions, make sure your PC is absolutely clean (use a good anti-spyware application and scan it regularly) and use SFTP or Secure Shell Access to upload/download stuff from your server.