Not able to connect to AlwaysOn Availability listener

Question

Hi,
I have configured alwaysOn Availability SQL in Azure environment with multiple data centers. Upon configuring listener and accessing from SSMS through port I am ending up with below error,
A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) (Microsoft SQL Server, Error: 10054)
Also, I can see that IP Address of different subnet is able to come online. Can this be reason for this failure?

Answer 1

The Availability Group listener on Azure is exposed on a public IP address that you get when you configure your Azure virtual network. Because you've created a load balanced set name (I assumed this because you've mentioned probe port,) the public IP address
will be routed to different virtual machines via the probe port. The public IP with the public port needs to be mapped to the Availability Group listener public IP and private port, respectively. If your public port is the same as your private port on the
Azure VM endpoint, then, the probe port on the Azure VM endpoint has to be the probe port on the Availability Group listener IP resource name. It's a bit confusing to understand the probe port in the context of Availability Groups because the concept is used
for load balancing workload across virtual machines whereas Availability Groups do not necessarily perform load balancing.
Edwin Sarmiento SQL Server MVP | Microsoft Certified Master
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