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Networking, Linux and AWS terms
Networking, Linux and AWS terms Key terms from networking, Linux and AWS: CIDR, SSH, security group, IAM, sudo. CIDR : the /24 network notation. SSH : secure remote login. Security group : an AWS instance firewall. IAM : who can do what in AWS. These are the building blocks of cloud security work. K
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What this card says
What it is
Key terms from networking, Linux and AWS: CIDR, SSH, security group, IAM, sudo.
Quick meanings
CIDR: the /24 network notation. SSH: secure remote login.
Security group: an AWS instance firewall. IAM: who can do what in AWS.
Why it matters for security
These are the building blocks of cloud security work.
Keep port, server, password in English for clarity.
| Red team (attacker) does | Blue team (defender)… |
|---|---|
| Scans random public CIDRs “for practice” | Scans only OWN host-only / documented Free Tier |
| Leaves SSH password + 0.0.0.0/0 SG | Keys-only SSH; tight SG; fail2ban; sudo yum update |
| Makes S3 bucket public “temporarily” | Block Public Access; least-privilege IAM; CloudTrail |
Learn more in the lesson: 50.3 Networking, Linux and AWS terms