Symptoms
RAS Console can't connect to the farm, error Unable to connect to farm <...> Please make sure that <...> is online and the RAS Redundancy Service is running is thrown:
However, RAS Redundancy Service is running on the target server and locally installed RAS Console works fine.
Cause
Connections to TCP port 20001 on the Connection Broker server are blocked by the firewall:
Resolution
Allow incoming connections on TCP port 20001.
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