In Lightsail instances, Http sometimes cannot be accessed from the public network after restarting.
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Local access to the server is normal.
The public network is also accessible within a few minutes after restarting.
But after a few minutes, the public network cannot be accessed, and the local can still be accessed.
AWS OFICIALAtualizada há 2 anos
Have you tested by addressing the instance's public ip directly? This can help determine if the issue is dns related.