Ravi Sir's Cards › AWS
Network debug order
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
Why do we need it?
Go layer by layer.
What is it?
Link, IP, route, DNS.
How to do it
Port, firewall, app.
Example
Test the port.
nc -zv 10.0.2.10 5432