Issue
When you try to connect to Amazon Redshift, one of the following errors might occur:
TableauException: could not connect to the server: Connection timed out (0x0000274C/10060) Is the server running on host "<hostname>" (<IP address>) and accepting TCP/IP connections on port <port number>? Unable to connect to the server "<server name>". Check that the server is running that that you have access privileges to the requested database.
Or
Could not connect to the server;
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
[<IP address:Port>]
Unable to connect to the server "<Redshift server name>". Check that the server is running and that you have access privileges to the requested database.
Unable to connect to the server. Check that the server is running and that you have access privileges to the requested database.