CodePudding user response:
Pro 80 443 are TCP protocol, want to ping, need to open the ICMP,CodePudding user response:
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CodePudding user response:
Wrong,Vbaspdelphi said is right the ICMP
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-rules-reference.html? ShortFooter=true# sg - rules - ping