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Yes you can specify a more granular ingress security group rule. The Redshift Cloudformation Cluster Security Group Ingress page provides the appropriate guidance on how to add that parameter to your Cloudformation template and some examples.
answered 2 years ago
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You can create a custom AWS Cloudformation resource which would enable you to run a script, AWS Lambda function, or other automation to acquire the IP Address and store that as an output variable that the Redshift template could use in its deployment. A blog post demonstrating the use of custom Cloudformation resources is available here
answered 2 years ago
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Hi Allison_P, Thank you so much for the reply. I have gone through the link but every time, the user needs to hardcode whenever they run the stack. But, the requirement here is the stack automatically fetch the IP of user system i.e., Whoever runs it, it should fetch and update the value instead of hardcoding. Please guide me here if you have any other views on the approach.