The Ultimate Guide to Practical Cloud Security Commands in 2025

Introduction:

Cloud security is paramount as over 70% of enterprises migrate operations entirely to cloud environments by 2026. Misconfigurations remain a leading cause of breaches, demanding proficiency in platform-specific security tools. This guide delivers actionable commands and configurations for AWS, Azure, and GCP to harden critical assets.

Learning Objectives:

• Execute critical IAM, encryption, and network security commands across AWS/Azure/GCP
• Detect and remediate common cloud misconfigurations using CLI tools
• Implement automated security auditing for cloud environments

1. Securing AWS S3 Buckets

`aws s3api put-bucket-policy –bucket my-bucket –policy file://policy.json`

Step-by-Step:

1. Create `policy.json` denying public access:

{
"Version": "2012-10-17",
"Statement": [{ 
"Effect": "Deny",
"Principal": "",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::my-bucket/",
"Condition": {"Bool": {"aws:SecureTransport": false}}
}]
}

2. Apply policy via AWS CLI. Verify with: `aws s3api get-bucket-policy-status –bucket my-bucket`

2. Azure Storage Account Encryption

`az storage account update –name mystorage –resource-group mygroup –encryption-key-type=Account –encryption-key-source Microsoft.Keyvault`

Step-by-Step:

1. Enable customer-managed keys:

az keyvault key create --vault-name myvault --name mykey --protection software
az storage account update --name mystorage --encryption-key-name mykey --encryption-key-vault https://myvault.vault.azure.net

2. Audit with: `az storage account show –name mystorage –query encryption`

3. GCP Firewall Rule Hardening

`gcloud compute firewall-rules create deny-rdp –network default –direction INGRESS –action DENY –rules tcp:3389 –source-ranges 0.0.0.0/0`

Step-by-Step:

1. Block global RDP access:

gcloud compute firewall-rules update default-allow-rdp --source-ranges 192.168.1.0/24  Restrict IP range

2. Verify: `gcloud compute firewall-rules list –filter=”direction=INGRESS”`

4. Cloud Vulnerability Scanning with Nmap

`nmap -sV –script ssl-enum-ciphers -p 443 cloudapp.azure.com`

Step-by-Step:

1. Scan for weak TLS ciphers:

sudo nmap -Pn -sS -T4 --open -p- --min-rate 1000 -oA cloudscan target.com

2. Analyze results: `grep “TLSv1.0” cloudscan.nmap`

5. Kubernetes Pod Security Policy

`kubectl apply -f – <Step-by-Step:

1. Enforce non-root containers:

apiVersion: apps/v1
kind: Deployment
spec:
securityContext:
runAsNonRoot: true
runAsUser: 1000

2. Validate: `kubectl get psp restricted -o yaml`

6. CloudTrail Log Integrity Check

`aws cloudtrail validate-logs –trail-arn arn:aws:cloudtrail:us-east-1:123456789012:trail/my-trail –start-time 2025-07-01T00:00:00Z`

Step-by-Step:

1. Enable log validation:

aws cloudtrail update-trail --name my-trail --enable-log-file-validation

2. Monitor via S3 event notifications

7. Azure AD Conditional Access CLI

`az ad policy conditional-access create –display-name “Block Legacy Auth” –conditions client-app-types=exchangeActiveSync,browser,other –grant-controls block`

Step-by-Step:

1. Disable legacy protocols:

New-CsTenantFederationConfiguration -BlockedDomains @{add=".highrisk.com"}

2. Audit logins: `az monitor activity-log list –query “[?operationName==’Sign-in activity’]”`

What Undercode Say:

• Automate or Perish: Manual cloud security checks fail at scale. Embed commands in CI/CD pipelines using tools like AWS CloudFormation Guard (cfn-guard validate -d template.yaml -r rules.guard)
• Zero Trust Is Non-Negotiable: Default-deny network policies and mandatory encryption in transit (verified via tcpdump -i eth0 -n 'tcp port 443 and (tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x47455420)')
• Certifications ≠ Competence: While CCSP/AZ-500/AWS Security Specialty validate knowledge, real-world skills come from labs like TryHackMe Cloud or Azure Security Center simulations

Analysis: The 2025 cloud threat landscape demands fluency in infrastructure-as-code security. Breaches increasingly stem from API misconfigurations (detectable via owasp-zap -t https://api.target.com -g gen.conf) and overprivileged service accounts. Professionals must master not just platform UIs but CLI-driven automation – particularly for incident response (aws s3 cp s3://forensics-bucket/instance-i-1234/ /local/evidence --recursive). Cloud security pivots from perimeter defense to data-centric enforcement, requiring command-line proficiency in encryption, secrets management (vault kv get -format=json secret/db-creds), and real-time monitoring.

Prediction:

By 2027, AI-driven attack vectors will target cloud control planes directly, making automated security baselining mandatory. Expect regulatory penalties for unencrypted cloud data at rest, verified via commands like gcloud kms keys versions list --key=my-key --keyring=my-ring --location=global. Cloud security CLI skills will become as fundamental as networking knowledge in legacy IT roles.

IT/Security Reporter URL:

Reported By: Jared Kucij – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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