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Unable to ping from frontend to back end instances

I am trying  to ping from front end instance  to back end instance . I have created rules in place (target back end service account & filter as front end service account ingress allow ) which only makes connection between frontend & backend via respective service accounts only. Please advise me what am missing here?

Tuan LE

Could you describe the rule you’ve created with more details? It should be included with: source, destination, source port/protocol, destination port/protocol.

1 Answers

Here are the security group requirements for ping: 

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-rules-reference.html#sg-rules-ping  

If you have NACLs, you’ll also have to take into account ephemeral ports as well:

https://docs.aws.amazon.com/vpc/latest/userguide/vpc-network-acls.html#nacl-ephemeral-ports

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