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The instance has now moved to the public qh2_uom network and will have a different IP address associated with it. Since a new interface was attached to the instance, only the default security group will be attached to it - so add the relevant security group(s) to the instance as per your use case. Note that your instance is now accessible world-wide, apply the necessary security groups to keep it secure and minimize cyber-attacks.
Please make sure that you adhere to the security guidelines listed and familiarise yourself with the Operational guidelines.