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Multiple domains and multiple certificates pointing to one MVC app

With our in-house system there is small app that reads the domain name at the IIS root from the incoming request - if it's one that is managed by us it is directed to the customer website held on the same IIS Server, if not it goes to our corporate one - the entire site html is held on a back-end DB and formed then so each one appears unique.

This has worked well in the past as the domains were basic http - if they needed to make a payment the domain was switched to one of our own with a ssl cert. These days any site without a cert is being flagged by modern browsers and it's enough of a pain in the rump ordering and updating the certificates for six domains never mind hundreds.

So, the question being - with Azure - can we just register a domain, point it to the app ip address, then somehow configure Azure to accept the new domain and issue a certificate?

Solution

  • Yes, a single App can have multiple domains and certificates by using Azure App Service.

    As per this MSDoc, single App can have multiple certificates and domains with the same IP.

    **SNI SSL allows - Multiple SNI SSL bindings may be added. This option allows multiple TLS/SSL certificates to secure multiple domains on the same IP address.

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    you will find an option to select the SSL Certificate and Type.

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    This has worked well in the past as the domains were basic http

    Also refer this blogs 1 and 2 for more details.