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1.8k Views by Jason Striegel updated November 17, 2023, 10:24 am inWordpress

How to Properly Setup SAML Single Sign-On (SSO) in WordPress

Single sign-on (SSO) is becoming an increasingly important capability for any modern web platform. According to a recent survey, over 68% of organizations are planning to implement SSO to improve user experience and security.

With 15+ years of experience managing complex WordPress sites, I can tell you that properly implementing SSO is critical for a seamless login process. In this comprehensive guide, we will walk through how to expertly configure SAML single sign-on in WordPress.

Contents

  • Why Every WordPress Site Needs SAML Single Sign On
  • Step-by-Step Guide to Setting Up SAML SSO in WordPress
    • Method 1: Set Up SAML SSO with Google Apps Login
    • Method 2: Set Up SAML SSO with SAML Single Sign On Plugin
  • Tips from a WordPress Expert for Flawless SSO Implementation
  • Common SSO Pitfalls and How to Avoid Them
  • Key Takeaways to Keep in Mind

Why Every WordPress Site Needs SAML Single Sign On

Here are some key reasons why you should seriously consider adding SSO capabilities:

  • Eliminates Password Fatigue: Your users no longer need to remember multiple passwords. After SSO setup, they can log into all connected sites using one set of credentials. This leads to up to 37% higher user retention as per Forrester research.

  • Enhances Security: User identities are managed by secure providers like Google and Microsoft instead of separate WordPress user accounts. This adds a robust layer of protection and reduces account compromise by as much as 52% according to Gartner.

  • Simplifies Login: Users don‘t need to go through the password reset process over and over. With SSO, they can just login with their Google or Office 365 account in one click.

  • Centralizes Access Control: Admins can easily add or revoke user access across all connected apps and sites from a central dashboard instead of managing each one separately.

  • Works Across Devices: SSO offers a consistent and seamless login experience whether users are on desktop or mobile.

According to Okta‘s network data, over 40% of weekly SSO authentications happen on mobile devices.

Implementing SSO provides tremendous value, both for your users and for reducing your admin workload. That‘s why industry leaders like Microsoft, Slack, Dropbox, and GoDaddy rely on SSO for their platforms.

Next, let‘s go through the step-by-step process for setting up SSO for your WordPress site using two great plugins.

Step-by-Step Guide to Setting Up SAML SSO in WordPress

You can enable single sign-on functionality in WordPress through popular standards like SAML 2.0. This allows you to connect your WordPress identities and permissions to user accounts from providers like Google, Salesforce, and Office 365.

We will show you how to properly implement SAML SSO using two excellent plugins:

Method 1: Set Up SAML SSO with Google Apps Login

The Google Apps Login plugin makes it a breeze to let users log into your WordPress site with their Google account.

Here are the steps to configure it:

  1. Install and activate the Google Apps Login plugin within your WordPress admin dashboard.

  2. Head over to the Google Cloud Console and create a new project. This will be used to connect your WordPress site with Google‘s servers securely.

  3. Within the project, go to the OAuth Consent Screen configuration page. Make sure you select "External" to allow any users with a Google account to signin.

  4. Under the Credentials section, click ‘Create Credentials‘ dropdown and choose ‘OAuth Client ID‘. Select the application type as ‘Web Application‘.

  5. Add your authorized WordPress domain and enter the login redirect URL. The redirect URL is your WordPress login page, usually yoursite.com/wp-login.php.

  6. Google will generate a Client ID and Client Secret key for your app. Copy these keys and paste them into the Google Apps Login settings page within your WordPress admin.

  7. Add a "Login with Google" link or widget to your WordPress site so users can easily discover the login option.

That‘s all there is to it! With just those few steps, your WordPress site now supports streamlined login using Google accounts.

Let‘s move on to our second method of setting up SAML single sign-on.

Method 2: Set Up SAML SSO with SAML Single Sign On Plugin

The SAML Single Sign On plugin allows you to add single sign-on functionality connected to Google Workspace, Office 365, Salesforce, and more.

Follow these steps to configure SSO using it:

  1. Install and activate the SAML Single Sign On plugin within your WordPress admin dashboard.

  2. In the plugin‘s settings page, select your preferred identity provider service. For this guide, we will use Google Workspace.

  3. Copy your SAML endpoint values (SP Entity ID and ACS URL) from the plugin‘s Service Provider Metadata section.

  4. Create a custom SAML app in your Google Workspace admin console and enable it for all users that need access.

  5. Download the Google SAML metadata XML file and upload it to the plugin using the prompts.

  6. Optionally configure attribute and role mapping based on your requirements. The free version has limitations.

  7. Add a "Login with Google" link on your WordPress site for user access to SSO.

The plugin will handle all SAML assertions and redirects in the background when a user logs in through the linked Google account.

Now that you know how to set up single sign-on using two great plugins, let‘s go over some tips to ensure smooth execution.

Tips from a WordPress Expert for Flawless SSO Implementation

Based on my many years of experience helping clients implement SSO, here are some recommendations:

Map User Accounts Correctly

Make sure to create WordPress user accounts for each person that needs SSO access. Their WordPress usernames should match their Google/Microsoft usernames exactly.

Use a Google Developer Project

For Google SSO, create a separate developer project instead of using your personal Google account. This gives you more security and flexibility.

Get the Right Business Subscription

For enterprise providers like Office 365, Slack, or Salesforce, ensure you have the required business subscription plan that enables SSO integration.

Test Extensively Before Launch

Thoroughly test the full SSO login flow for different user roles before rolling out to production. Catch any issues beforehand.

Educate Internal Teams

Train any internal teams on how SSO changes login procedures, password requirements, and access controls across all connected apps.

Prominently Display SSO Login Options

Add highly visible "Login with Google" (or other provider) links/widgets on key pages so users can easily discover them.

Closely Monitor Initial Usage

Check SSO logs frequently after launch to identify and quickly resolve any production issues that may arise.

Consider Disabling Standard WordPress Login

Once SSO is working smoothly, you can disable regular WordPress login for enhanced security. Use a plugin like WP Force Login.

Common SSO Pitfalls and How to Avoid Them

Here are some of the most common mistakes to watch out for when implementing single sign-on:

Issue Solution
Certificate errors Ensure valid TLS certificates are installed on all connected apps. Renew if expired.
Login loop Application redirect URIs may be misconfigured. Double check settings match on both sides.
Mixed content warnings Use HTTPS URLs for all SSO endpoints and identity provider domains.
Users get blocked Some users can‘t login because their accounts don‘t exist or don‘t match. Provision accounts beforehand.
Custom SAML code needed Use a premium plugin like WPSaml Auth for more flexibility.

Targeting these potential pitfalls will ensure your single sign-on deployment and ongoing usage is smooth and painless.

Key Takeaways to Keep in Mind

Here are the most crucial points to remember when implementing single sign-on with SAML in WordPress:

  • Properly configuring SSO improves user experience, security, and convenience. It should be a priority.

  • Popular plugins like Google Apps Login and SAML Single Sign On make setup straightforward.

  • Get required credentials from identity providers like Google Workspace or Office 365.

  • Take time to test SSO extensively across user roles before launch.

  • Add SSO login links/widgets to your WordPress site for easy discovery.

  • Monitor usage closely after go-live to identify and fix any issues.

  • Consider blocking standard WordPress login after stable SSO usage.

I hope this guide served as a definitive resource to help you expertly implement seamless single sign-on for your WordPress site. Please reach out if you need any assistance getting it configured. Happy logging in!

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Written by Jason Striegel

C/C++, Java, Python, Linux developer for 18 years, A-Tech enthusiast love to share some useful tech hacks.

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