Why is a public IP address needed for Express Route Gateway

Tyrone Paige 41 Reputation points Microsoft Employee
2022-04-10T02:45:30.827+00:00

Express route provides a private connection between on premise data center and Azure. Since traffic does not go over the Internet, why is a public address needed for the Express Route Gateway? I would expect the Express Route Gateway to use an IP address from the private IP address space from the VNet.

Azure ExpressRoute
Azure ExpressRoute
An Azure service that provides private connections between Azure datacenters and infrastructure, either on premises or in a colocation environment.
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  1. ChaitanyaNaykodi-MSFT 26,101 Reputation points Microsoft Employee
    2022-04-12T02:42:36.843+00:00

    Hello @Tyrone Paige ,

    As per the FAQ documentation here The public IP address associated with Express Route Gateway is used for internal management only, and does not constitute a security exposure of your virtual network.

    Hope this helps!

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  1. Tyrone Paige 41 Reputation points Microsoft Employee
    2022-04-12T13:42:35.943+00:00

    Hello @ChaitanyaNaykodi-MSFT , thank you for the answer. I went through that FAQ several times before I posted my question :(

    I'll need to do better.

    Tyrone

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