azure - best way to redirect securely one domain to another in IIS without having a website

Question

I would like to know what is the best way to redirect everything from marketing-address.com to real-address.com.

best means

• as less effort as possible,
• as cheap as possible,
• as secure as possible.

In detail:

• Less effort: If possible without the need of creating a website oder some code like javascript
• Secure: https://marketing-address.com should be accpeted by the browsers - no warning.
• Cheap: if possible without buying a certificate (I don't think that this is possible) and without having a second webserver running

So in theory, the communication would be like this:

• Making the address targeting the same IP address
• Making the existing IIS listen to that address to
• Let IIS tell the caller "yes, you're totally right here, but I neither I have a website nor do I have a certificate, but you don't need anything of that since you get redirected anyway..."

Is there a chance to accomplish that? If no, I would need to buy a certificate. What would be the solution then?

There are 2 restrictions:

1. We are using an Azure App Service for hosting an asp.net core site, which seems to be very restricted in configuration possibilities
2. The browser should definetly show the real-address.com in the URL, not the marketing-address.com.

Answer 1

Have you tried to use an Application Gateway before the IIS/Webapp at the backend?

I believe the AppGW will solve these issues, the AppGW can redirect the hostname to another web address, as many you want to.

https://docs.microsoft.com/en-us/azure/application-gateway/ssl-overview#tls-termination