How to use HTTPS in Azure Web API - azure

Currently my application url coresponds to HTTP only. How can I make it compatible with HTTPS also.. Can I do that specifically to single service only.

For first you should upload your SSL certificate through Azure Management panel (.pfx with private key) and attach it to your cloud service or web site.
Then setup HTTPS endpoint for your WEB API web role within your Azure cloud project, there you should also define SSL certificate thumbprint.
Regards.

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Mutual SSL Authentication in Azure App Service

I am using Azure App Service to access a webservice hosted elsewhere. The webservice requires mutual TLS Authentication.
I have been given the public certificate from the provider of the webservice but where do I install this public certificate in Azure? In a traditional server environment, I would install in the certificate store. But in Azure, do I install it on the application gateway? or the Vault? How does Azure app service know where the certificate is installed and present it?
Private and Public certificates can be uploaded to Azure Web App: https://learn.microsoft.com/en-us/azure/app-service/configure-ssl-certificate?tabs=apex%2Cportal
Code running in Azure Web App can access those certificates in different ways, it depends on what language and runtime your application is using: https://learn.microsoft.com/en-us/azure/app-service/configure-ssl-certificate-in-code
In regards to your other questions:
"do I install it on the application gateway"?
From what I understand, your application is going to make outgoing calls to a webservice hosted elsewhere. Azure Web App outgoing traffic does not go through Application Gateway - so no, in your case storing certificate in Azure Web App and accessing it from the code is a good solution.
"or the Vault"? Azure Web App can also store certificates in Azure Key Vault. Your code could also connect to Azure Key Vault directly, bypassing Azure Web App key store altogether.
Finally, "How does Azure app service know where the certificate is installed and present it?" Please see the first two links I provided.
In the future, Azure has an excellent documentation on all of their products, a simple search engine search typically helps to narrow down many primitive answers.
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Binding Azure App managed SSL to custom domains throgh REST API

Hi I have a PHP application installed in the Azure web app, in that application users can add there own domain as cname alias custom domains through submission of a form which already implemented, what I need is the option to bind Azure App managed SSL certificate to that custom domain so the customers can access the website in https, I am looking for a REST API for this functionality is it possible to automate this feature.
I've listed below the REST APIs you can use:
https://learn.microsoft.com/en-us/rest/api/appservice/certificates/createorupdate
to create the app service certificate.
https://learn.microsoft.com/en-us/rest/api/appservice/domains/createorupdate
to create the domain.
https://learn.microsoft.com/en-us/rest/api/appservice/webapps/createorupdatedomainownershipidentifier
to assign the domain to the app service.

Azure application gateway with app service - https listener using app service

In Azure I've an application gateway connected with a backend-pool with an Azure app service. This Azure app service accepts http and https traffic.
I added an http listener and created a rule to redirect http traffic to backend pool. This is working fine.
However I would like to do the same with https protocol. But when I'm trying to add the https listener I'm requested to add the pfx certificate. This is expected obviously. But in this case I would like to redirect the https traffic to the Azure App Service which has configured https access, and there is no way (that I know) to export Azure App Service certificate.
Do you know if there is a way to redirect https traffic on an application gateway to an Azure App Service without the certificate "trusting" only on Azure App Service?
Thanks,
Would it help you if you had an exported copy of your app service certificate? If so, you can do so by going to portal.azure.com> app service certs> select your cert> select the export certificate blade > select open key vault secret> select the current version of your cert> select "download as a certificate.

Where does the Web App take certificate from if I did not add it?

I created a new Web App on D1 App Service Plan. I just published the application (.Net Core 2.2 app) from Visual Studio. I see that I can access my app with HTTPS and the browser tells me that this is a secured connection (with a padlock).
How did that happen? When I go to TLS/SSL section of my Web App settings, there are no certificates added.
Even without the custom domain, you have SSL enabled for your site. By default, Azure secures the *.azurewebsites.net wildcard domain with a single SSL certificate, so your clients can already access your app with https.

Let's Encrypt Certificate in Azure Web App for Containers with Custom Domain

My goal is to create an Azure Web App for Containers, map a custom domain to it and secure this domain with an SSL certificate from Let's Encrypt which is automatically renewed every month.
So far I have successfully configured a docker-compose for the web app:
Nginx which handles Let's Encrypt certificate renewals and https redirections
Web App to which Nginx proxies to
Also, I successfully mapped my domain to the Azure Web App.
But there is a problem. It seems Azure is applying some certificates on its own. When I want to use the Web App from my browser, the certificate for *.azurewebsites.net is served:
Can I somehow disable SSL for the Azure Web App for Containers so that my Nginx proxy is responsible for this or use Let's Encrypt in some other way? I know that for the Windows-Based Web Apps there is a Let's Encrypt extension, but there is no one for Azure Web App for Containers.

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