An EC2 instance can become unreachable if a status check fails, which indicates a problem with the instance or the underlying host.
To resolve the issue, you can stop and start the instance to migrate from the current underlying host.
If both the instance and system status checks fail, then see the EC2 Windows instance documentation for further troubleshooting.
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An EC2 instance becomes unreachable if a status check fails.
A system status check failure indicates a problem with the AWS systems that your instance runs on. When a problem with an underlying host impacts your production, you can stop and start your instance to migrate from the current underlying host.
Troubleshoot a system status check failure on an unreachable EC2 ...
Instance ID : i-083cefe3bf5337adf Status checks: 2/2 checks passed. Instance unreachable from home region. SSH, HTTP. I can reach the instance via HTTP when using a VPN node that is…
Instance unreachable intra-region. | AWS re:Post