What are Security Groups in EC2 and what are the critical ports every cloud engineer must know? Security Groups act as virtual firewalls controlling inbound/outbound traffic using stateful rules. The must-know ports are: Port 22 (SSH/Linux), Port 3389 (RDP/Windows), Port 80 (HTTP), and Port 443 (HTTPS). Best practice: start restrictive and open only what's needed. - Ekasquest

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What are Security Groups in EC2 and what are the critical ports every cloud engineer must know?
Security Groups act as virtual firewalls controlling inbound/outbound traffic using stateful rules. The must-know ports are: Port 22 (SSH/Linux), Port 3389 (RDP/Windows), Port 80 (HTTP), and Port 443 (HTTPS). Best practice: start restrictive and open only what's needed.

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