To access the Airbyte UI, you need to ensure that the correct ports are open. In your case, you should have ports 8000-8003 open for inbound traffic as mentioned in the [Slack conversation](
https://airbytehq.slack.com/archives/C021JANJ6TY/p1670516069872449). If you are seeing the Nginx default page instead of the Airbyte UI, it might be an issue with the Airbyte startup. The support conversation suggests that you might need to redeploy or try a new version of Airbyte. Also, ensure that you have correctly installed and started Airbyte on your EC2 instance as per the instructions provided in the [Airbyte documentation](
https://docs.airbyte.com/deploying-airbyte/on-aws-ec2). If you're still having trouble, you might want to check the logs for any errors or issues. If you're still unable to access the Airbyte UI, it might be best to reach out to the Airbyte support team for further assistance.