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I have few EC2 instances across VPC and non-VPC.

VPC Instance VPC-Dev1 VPC-Dev2

Without VPC EC2-Dev1 EC2-Dev2

I can access (RDP) all the servers from outside world. I have given RDP access to all (0.0.0.0/0) to ensure that I am not missing out anything.

However, I can't access VPC-Dev1 from EC2-Dev1 or vice-a-versa. Is there any specific firewalls related setup I need do to allow AWS instances to get access to each other?

Any help much appreciated!

user3389391
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1 Answers1

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If you are trying to make the calls using the private IPs, try using the public IPs.

Uri Agassi
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