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Sophos UTM9 to Azure Ipsec connection

Hi all,

I have a customer with a Sophos UTM9. I have a Virtual Network Gateway setup in Azure.

I am getting egress traffic in Azure, but no ingress. The Sophos appears to not be sending the traffic back.

Logs are showing "Invalid Message ID".

We followed this tutorial 100%.

I have had two experience network engineers look at this, and one a supposed Sophos expert.

Any ideas?

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