Ravi Sir's Cards › AWS
Refused vs timeout?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
Read card text
What this card says
What it is
Refused: host up, nothing listens.
Why it matters
Timeout: firewall drops.
How / example
Check listener.
sudo ss -ltnp