Error "[SQLState 08S01] timeout expired" When Connecting to Amazon Redshift from Tableau Cloud

Add an ingress rule to the Amazon EC2 security group attached to your Amazon Redshift cluster to allow inbound traffic from the IP addresses used by Tableau Cloud when connecting to data sources.

For more information about Amazon EC2 security group rules, see Security group rules. 

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For more information about the IP addresses used by Tableau Cloud when connecting to data sources, see Tableau Cloud IP addresses for data provider authorization.