Listen to this Post
Introduction
Cybersecurity is a rapidly evolving field, requiring continuous learning and hands-on practice. Izzmier Izzuddin Zulkepli, a Cybersecurity Solution Manager, has compiled a valuable repository of resources to help enthusiasts and professionals strengthen their skills. This article highlights key cybersecurity concepts, practical commands, and best practices extracted from his shared materials.
Learning Objectives
- Understand essential Linux and Windows commands for cybersecurity.
- Learn how to secure APIs and harden cloud environments.
- Explore vulnerability exploitation and mitigation techniques.
1. Linux Security Commands
Check Open Ports with `netstat`
netstat -tuln
What it does: Lists all active listening ports on a Linux system.
How to use:
1. Open a terminal.
2. Run the command to identify open ports.
3. Investigate unexpected ports for potential security risks.
Monitor User Logins with `last`
last
What it does: Displays a log of recent user logins, including timestamps and IP addresses.
How to use:
1. Execute the command to review login history.
2. Look for unauthorized access attempts.
2. Windows Security Commands
Scan for Malware with Windows Defender
Start-MpScan -ScanType FullScan
What it does: Initiates a full system scan using Windows Defender.
How to use:
1. Open PowerShell as Administrator.
- Run the command to detect and remove malware.
Check Firewall Rules
Get-NetFirewallRule | Select-Object Name, Enabled
What it does: Lists all firewall rules and their status.
How to use:
1. Run the command in PowerShell.
2. Disable unnecessary rules to reduce attack surface.
3. API Security Best Practices
Validate Inputs to Prevent Injection
from flask import Flask, request, abort
app = Flask(<strong>name</strong>)
@app.route('/api/data', methods=['POST'])
def get_data():
user_input = request.json.get('input')
if not user_input.isalnum():
abort(400, "Invalid input")
return {"status": "success"}
What it does: Ensures only alphanumeric inputs are processed.
How to use:
1. Integrate input validation in your API endpoints.
- Reject malformed requests to prevent SQLi or XSS.
4. Cloud Hardening (AWS Example)
Enable S3 Bucket Encryption
aws s3api put-bucket-encryption \
--bucket my-bucket \
--server-side-encryption-configuration '{"Rules": [{"ApplyServerSideEncryptionByDefault": {"SSEAlgorithm": "AES256"}}]}'
What it does: Enforces encryption for an S3 bucket.
How to use:
1. Install AWS CLI and configure credentials.
2. Run the command to enable default encryption.
5. Vulnerability Mitigation
Patch Management with `apt`
sudo apt update && sudo apt upgrade -y
What it does: Updates all installed packages on Debian-based systems.
How to use:
1. Run regularly to apply security patches.
What Undercode Say
- Key Takeaway 1: Regular system monitoring and patch management are critical to preventing breaches.
- Key Takeaway 2: API security requires proactive measures like input validation and rate limiting.
Cybersecurity is not a one-time effort but a continuous process. Leveraging verified commands and best practices, as shared by experts like Izzmier Izzuddin Zulkepli, can significantly reduce risks. As threats evolve, staying updated with hands-on training and community resources will be indispensable for professionals.
Prediction
The increasing adoption of AI in cybersecurity will automate threat detection but also introduce new attack vectors. Professionals must balance automation with manual oversight to stay ahead of adversaries.
For more resources, visit Izzmierโs repository: Cybersecurity Documents.
IT/Security Reporter URL:
Reported By: Izzmier For – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass โ
