The issue you're facing with connecting RDS to Workbench could be due to a variety of reasons.
- RDS Endpoint & Port: Verify you're using the correct RDS endpoint and port (typically 3306 for MySQL).
- IAM Permissions: If using IAM for database authentication, ensure the necessary permissions are granted.
- Security Groups: Confirm the associated security group allows inbound traffic on port 3306 from your IP.
- Database Credentials: Ensure correct username and password. If uncertain, reset the master password in the RDS console.
- NACLs: If using a VPC, check the associated NACLs to ensure traffic is allowed on the necessary ports.
- Subnet & VPC: Confirm the RDS is in the correct subnet with proper routes to the internet (if connecting externally).
- Public Accessibility: Check if your RDS is set to be publicly accessible if connecting from an external location.
- DNS & Network Route: Use tools like nslookup to diagnose potential DNS issues.
- Encryption: If RDS is encrypted, ensure MySQL Workbench supports SSL and you have the RDS SSL root certificate.
- MySQL Workbench: Verify compatibility with your RDS MySQL version and check connection settings.
Remember to always be cautious when adjusting security or access controls.
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