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Question about Networking Order of Operations
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If I have

  • 2 ec2 servers communicating over port 12345.
  • A security group allowing traffic over that port between those 2 servers
  • A network ACL blocking inbound/outbound traffice on port 12345

Will my 2 servers be able to communicate with each other? Or will the Network ACL deny them.

Essentially - what is the order of operations when evaluating these rules?

Edit: I realize this may sound like some sort of exam question. Sorry about that :( What I'm really asking is:

What I'm really asking is - what is evaluated first between 2 ec2 servers talking to each other: a security group or a nacl. And will the nacl get in the way of communications between those 2 hosts.

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4 years ago