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yeehuei
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Joined: Tue Jun 07, 2022 5:46 am

Unable to establish S2S VPN connection when NAT is enabled at the Azure VPN Gateway

Tue Jun 07, 2022 5:50 am

Dear all,

We recently setup a S2S VPN from Azure CLoud to on-premise Mikrotik router (Model: RB2011UiAS-2HdN-IN) and it's working as expected. As part of the business requirement, we need to apply Dynamic NAT to the incoming Source IP to avoid overlapping IP addresses.

After we enable the NAT at the Azure VPN Gateway, the S2S VPN connection failed to establish.
Image

At the Mikrotik router, we are seeing that the PH2 State with no phase 2 status. My question is, does Mikrotik router support NAT-enabled VPN setup at the remote VPN Gateway?

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