Read first the Connection dialog
page to understand the dialog fields( host, port, user, etc. ), SSH tunnel, etc..
How to Create A RedShift Cluster
Amazon RedShift is a cloud database. You will need a trial account by Amazon. There you have to create first under Security Groups a new Group with access to
Then you can start creating a Redshift Cluster.
For all steps use the default settings. In the step below, choose a public IP =yes and the VPC security Group you created before.
After the cluster is created you can connect from DbSchema.