Ravi Sir's Cards › AWS
firewalld in 4 steps
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
Why do we need it?
Open only what you need.
What is it?
--add-service or --add-port.
How to do it
--permanent, then --reload.
Example
See rules.
sudo firewall-cmd --list-all