Utilizing MultiSite with Azure Front Door and Multiple Subdomains

[qiuzman]

I have my primary domain www.example1.com as my CUSTOM_DOMAIN. However I have created a subdirectory multisite so sites in admin lists:
www.example1.com and www.example1.com/example2 however I have set the new sites url as www.example2.com and I have added the new domain to azure frontdoor and associated with the current web app route. Now when you go to www.example2.com it loads all the content from www.example1.com as if its just a new route for that site.

I was under the assumption when using CUSTOM_DOMAIN the app service manages the coordination of these requests so that if I had not use front door then I would have just added the domains to Custom Domains in the app service directly. However, since I am using azure front door I would have thought I would just add these domains to azure front door for the route. Is this not the case if you want to use azure front door? Should I create a new rule of some sort instead to make this work?

[samrueby]

Hi @qiuzman,

I want to make sure I understand you correctly.

• You already have WordPress properly configured as a Multisite. I.e. you are able to navigate to yoursite.com/wp-admin/network/sites.php and see your two configured sites, example1.com and example2.com
• The App Service is configured to listen for both domains. I.e. navigate to your App Service in the Azure Portal, navigate to Settings > Custom domains. Here you have example1.com and example2.com configured. This is always required to prevent abuse of the service. Configuring https bindings not required if Front Door will handle the termination.

Let's verify your Front Door service configuration. In your Front Door instance,

Navigate to Settings> Domains. Example1.com and Example2.com must be listed here.

Navigate to Settings> Origin groups. Your App Service should be listed as a origin here. Choose "Origin type: app services". Choose the correct app service. Leave Origin host header blank. For App Service and WordPress to properly serve the correct multisite, the http host header must be preserved.

Navigate to Settings > Front Door Manager. You should see a route here. That route should have your two domains. It should be associated with your origin group you configured. Status and Provisioning should be "succeeded".

Please verify all of the above and let me know if you're still seeing issues.