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What happens if Azure App Gateway HTTPS listener's SSL certificate expires, but backend App Service still has valid certificate?

Raj Appan 21 Reputation points
2022-11-04T18:19:20.357+00:00

Hi,

The certificate attached to the HTTPS listener might expire soon, but the backend has valid certificates thanks to Azure App Service Managed Certificates, which unfortunately can't be exported and thus I can't add it to the gateway listener. So, will there be an outage in accessing the App Service?

Thanks in advance.

Azure Application Gateway
Azure Application Gateway
An Azure service that provides a platform-managed, scalable, and highly available application delivery controller as a service.
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Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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  1. msrini-MSFT 9,276 Reputation points Microsoft Employee
    2022-11-05T08:38:28.597+00:00

    Hi,

    From the client perspective, the web site which users access will hit Application Gateway and if that cert expires, then there will be an issue. The App Service cert is used when Application Gateway tries accessing App Service. So, I would suggest you to plan for a maintenance window and update the AppGW certificate.

    Regards,
    Karthik Srinivas

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