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azureazure-vpn

Coexistence between Azure P2S VPN and Expressroute


On microsoft azure i have a point to site VPN. The adress pool is 192.168.54.0/24.

I also have an azure virtual network and the adress space is 192.168.53.0/24. This virtual network is connected to my on-premise site by an expressroute (My on premise site network adress is 192.168.55.0)

When a user is connected to my P2S VPN, he can contact(ping, RDS,etc...) Virtual machine in the 192.168.53.0 network but can't contact the on-premise servers(192.168.55.0).

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Does anyone has an idea?


Solution

  • According to the documentation and microsoft azure assistance, this kind of communication is not supported.

    https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-resource-manager#limits-and-limitations

    "Transit routing is not supported. You cannot route (via Azure) between your local network connected via Site-to-Site VPN and your local network connected via ExpressRoute."