3th of 4 Questions.
What are the best practices for securing EC2 instances?
EC2 Security Hardening
Securing EC2 involves a multi-layered approach focusing on identity, networking, and software updates. Following the principle of least privilege ensures that instances only have the permissions and network access absolutely necessary for their function.
Top Security Practices
Use IAM Roles instead of long-term access keys.
Apply the principle of least privilege to Security Group rules (avoid 0.0.0.0/0).
Regularly patch the OS and applications using AWS Systems Manager Patch Manager.
Disable password-based SSH logins and use SSH keys or Session Manager.
Enable VPC Flow Logs to monitor network traffic for anomalies.