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Hello.
Is ICMP allowed in EC2's security group inbound rules?
To ping EC2, you need to allow ICMP in the security group's inbound rules.
Also, if ICMP is allowed in the security group, please also check the firewall settings on the OS side.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-rules-reference.html#sg-rules-ping
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