MSSQL Always on network requirements

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Trying to set up a new MSSQL Always on cluster in Snapcenter through firewall but struggling to get it to work, just get a generic communication error.

Does anyone have documentation to what ports are required specifically for a MSSQL Always on cluster and for what resource?

For example, this sentence seems confusing (unblock from what?):
To discover the Microsoft SQL databases in a Windows cluster, you must unblock the Failover Cluster Instance (FCI) TCP/IP port.

From:
https://docs.netapp.com/us-en/snapcenter/protect-scsql/task_determine_whether_resources_are_available_for_backup.html

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@sand terrace Perhaps you have some input in regards to my questions above?

[sand terrace]

I would assume from the windows firewall

for additional port requirements see:
https://docs.netapp.com/us-en/snapcenter/protect-scsql/quick_start_to_install_snapcenter_plug-in_for_sql_server.html#host-and-port-requirements

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And the FCI port would be what?

[sand terrace]

at node level, TCP/IP port you used for the SQL clustered instance