Let’s create a Security Group which is used by the RDS instance.
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Login to AWS Management Console and change the region to Ireland.
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Goto VPC Management Console. Click on the Security Groups menu in the left and then click on the Create security group button.
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On the next screen, type in dojo-postresql-sg for the security group name and the description fields. Select the default VPC for the VPC field. Create inbound rule for PostgreSQL type from the Source = 0.0.0.0/0. Keep rest of the configuration to the default. Click on the Create security group button.
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The security group is created in no time. You launch PostgreSQL RDS instance in the next step.