Unless you have actively thought about your sites security (or are using a managed hosting provider that thinks about it for you), you likely have at least a few potential security holes.
Here are a handful of basic security precautions you should be taking with any website:
- Use a strong password for your hosting account, FTP accounts, email accounts, and any other accounts associated with your website.
- Do not use the same password for all your different accounts.
- Do not email your password or store it in plain text anywhere.
- Restrict FTP and SSH access to your IP address.
- Enable two-factor authentication on your hosting plan and your domain name registrar.
- Keep all of your software and plugins up to date.
- Back up your data regularly.
- Use a CDN that provides DDOS protection.
- Enable HTTPS on your site by getting an SSL certificate.
Since WordPress is the most popular content management system, here some WordPress-specific security tips:
- Do not use the default "admin" as your administrator user name
- Install the Bad Behavior and Akismet plugins to combat spam
- change your user nickname, so that your login name isn't publicly visible in posts and URLs
- Limit login attempts