Is it possible to increase the Keep-Alive timeout on an Application Gateway

Brian Brinch 61 Reputation points
2021-11-30T09:04:02.967+00:00

We got some IoT devices connecting with an Azure App Service through an Azure Application gateway. The mobile connection has a limited data capacity each month and because of this we need the connection to be kept alive. But the connection drops after apx 50 seconds and the cost to re-open the connection or ping to keep it alive is too much.

According to this link: https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-faq the default is 75 seconds in the v2 SKU. How can I increase the 75 seconds or obtain a connection that is kept alive

Azure App Configuration
Azure App Configuration
An Azure service that provides hosted, universal storage for Azure app configurations.
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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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Accepted answer
  1. msrini-MSFT 9,246 Reputation points Microsoft Employee
    2021-11-30T09:20:22.503+00:00

    @BBCDenmark,

    The default is 75 seconds and that settings is not editable. I think your issue is caused by the Request timeout settings in the HTTP settings.

    Reference: https://learn.microsoft.com/en-us/azure/application-gateway/configuration-http-settings#request-timeout

    That is editable and default is 30 seconds. Can you check and change the settings and see if that fixes your issue?

    Regards,
    Karthik Srinivas


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