'Application gateway to Azure Firewall forwarding to External ASE

I have a Application gateway configured to an External ASE but i couldn't find any document on how to implement an Azure firewall in-between an Application Gateway and External ASE.

I can see the link mentioned here https://docs.microsoft.com/en-us/azure/architecture/example-scenario/gateway/firewall-application-gateway#application-gateway-before-firewall on how to do this with VM as backend pool but couldnt find a way with External ASE.

Does anybody know if its possible to have a this case with traffic flow like AppGW -> AzFw ->External ASE?



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