This article details how to harden your WordPress installation. If your WordPress site has been hacked, please view the following article first:
There are a few common steps you can take to harden your WordPress installation right away. The chart below lists some basic precautions:
|Stuff to look out for||Details|
|Keeping software up to date||
|Removing old software||
|Checking logs and files||
This article describes each of the above in further detail.
Use strong passwords
One of the most important steps you can take is to always use strong passwords for all of your user logins. These include:
- Website user. This is the user you use to log into your server via FTP, SFTP or SSH.
- MySQL user. This is the user that has access to your database.
- WordPress user. This is the username you use to log into your WordPress site.
For more information about creating secure passwords, view the following article:
Use different usernames
A secure password is a good start. It's also a good idea to use different usernames for your logins. For example, your SFTP username should be different from your MySQL database username which should be different from your WordPress username.
Additionally, it's also a good idea to only host your WordPress site under a specific/unique username. In your panel, you can assign a single username to as many domains as you like. View the following article for details:
However, if that user is compromised, all sites under that user are then vulnerable. So, it's recommend to create a new SFTP user and assign that user only to your specific WordPress site.
If you then create a new site, create a new user. This will ensure all data is separated on the web server.
Add a named WordPress admin user
Make sure your admin user is not named admin.
If your admin user is named ‘admin’, create a new user with some other name and give it admin privileges. After you have confirmed that this account works, log in as this account and return to the left hand users tab and delete the account user named ‘admin’.
This is very important as ‘admin’ is the most commonly attacked username. View the following article for further information:
Use the HTTPS protocol for your site
When you normally connect to a website, it's usually done using the HTTP protocol which is unencrypted. This means that if you're logging into your WordPress site using HTTP://example.com, your password is sent in plain text. This is also the case if you're logging into your database via phpMyAdmin.
To prevent your password from being transmitted in the clear, it's recommended you add Secure Hosting to your site. This adds an SSL certificate which enables you to connect using HTTPS (note the 's' at the end). When you connect using HTTPS, your connection is encrypted and safe from anyone snooping on your network.
View the Adding an SSL Certificate article for details on how to add the certificate.
Then, you should use a plugin such as WordPress-https to configure secure hosting on your website.
Use SFTP or SSH to connect to your server
You must connect to your web server from time to time to make adjustments to your site or troubleshoot an issue. There are a few ways to connect.
- WebFTP - This client is available from within the DreamHost panel.
- FTP - You can use any FTP client to connect to your server over port #21. This is unencrypted so all information is sent in plain text for anyone to see.
- SFTP - Most clients that support FTP also support SFTP over port #22. This is a secure way to connect to your server and is always recommended.
- SSH - This is a way to connect to your server using a terminal program such as PuTTY for Windows.
Whenever possible, always use an encrypted connection such as SFTP or SSH to connect to your server.
Keep software up to date
It's very important to continually update your software. Updates to software is often done to resolve security issues. The more up to date your software is, the less vulnerable it is. This means keeping your WordPress version, plugins and themes up to date.
Updating your WordPress version
- Upgrading WordPress
- Upgrading a One-Click Install
- Using wp-cli to update plugins, themes and the WordPress version
One of the quickest ways to destroy your credibility as a WordPress blog is to have ton's of spam in the comment areas. The easy way to solve this is with an anti-spam plugin such as the following:
View the following guide from WordPress for further information:
Removing old software
Even if a plugin or theme is inactive, it could still pose a security risk. If you're not using a theme or plugin, make sure to delete it from your web server. Plugins and themes are located in the following directory:
Inside of that /wp-content folder, navigate into the /plugins or /themes directory and delete any that you do not use.
The same goes for extra installs of WordPress. For example, it's possible that a test site was created under example.com/wptest. Or maybe you had an old site but no longer use it. In any case, if you have another WordPress install that you're not using, delete it.
Finally, if you have any other applications such as Joomla, Drupal, or Moodle installed under your user that you're not using, make sure to remove those as well.
The bottom line is that if you're not using the software installed under your user, it's best to remove it. Only keep what you need.
Checking logs and files
If you suspect any unusual behavior, it's a good idea to check your access.log and error.log files. View the following article for details:
Make sure to also check your folder permissions:
Keep ongoing backups
With any website, it's always important to continually backup your data. This means backing up both your website files as well as any databases. View the following article for details:
A more advanced option is to use a version control system such as Subversion. However, for the majority of users, a normal backup is enough.
Protect your site with an .htaccess file
You can use an .htaccess file to further protect your site. For example, the wp-config.php should never be publicly accessible. To protect this file, add the following to an .htaccess file in your site's directory:
<Files wp-config.php> order allow,deny deny from all </Files>
There are several other things you can do with an .htaccess file to protect your site. View the following article for details:
- SSH overview
- What are the different types of DreamHost users?
- Passwords overview
- Secure Hosting overview
- How to set your One-Click WordPress installation to automatically update
- Viewing your error log via SFTP
- Viewing your error log via SSH
- WordPress backup tools
- .htaccess overview
- UNIX commands — Changing ownership
- UNIX commands— Changing permissions