Is it possible to combine WAF v2 application gateways from 2 different subscription

Question

currently we are using two WAF v2 application gateways for two resource groups under different subscription. Is it possible to combine both gateways from different subscription into one

Answer 1

@Kris Van Daele Yes, you can use a single Application Gateway that connect to backend instances across subscriptions. As long as you have IP connectivity, Application Gateway can communicate with instances outside of the virtual network that it's in. Application Gateway can also communicate with instances outside of the subscription it's in. If you plan to use internal IPs as backend pool members, use virtual network peering or Azure VPN Gateway.
https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-faq#can-application-gateway-communicate-with-instances-outside-of-its-virtual-network-or-outside-of-its-subscription