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AWS EC2 server crash - Cannot ssh login, ping fail

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My ec2 server (in Singapore) runs over 1 year and it was fine until yesterday.

It is suddenly crashed (very likely): all applications run on that server are all stopped and I can't ssh login, ping also fail, even after I reboot it from AWS web console. In the web console, the server status is normal, shows "running" with a green light. But I just can't do anything on it!

It never happened in the past 15 months. And AWS Technical doesn't allow me to request a technical support. What should I do?

I'm sure my security groups has setup correctly because I didn't change it at all.

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Chan you just check the VPC Settings i mean the Subnet associated with the EC2 instance and also the NACL's, Natgateway IP, Internet gateway etc. The second thing would be the Linux version upgrade and also try to run that using run command if you were not able to SSH. Before doing it assign a SSM Agent policy.




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