How to configure Outbound NSG for application gateway

heng yeow (nova) 90 Reputation points
2026-10-14T11:40:03.0633333+00:00

I want to configure the custom error pages for my listener in application gateway. The static .html page is in another VM which is different virtual network with application gateway.

When running the "connection troubleshoot" tool, I noticed the "Outbound NSG diagnostic" status is Denny. How to resolve it?

Please refer to the information below:

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User attachmentMy application gateway firewall is using "Standard V2".User's image

My application gate way's Virtual network/subnet : fornaxNet / fornaxNetSub

I have created Peerings to connect to the VM (in another Virtual network)

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The VM is in Virtual network/subnet : SPD-SIT-Network/SPD-SIT-Subnet1

Have also created the Peering.

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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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