Securing Cloud Infrastructure: A Practical Guide

Thu, 20 Jun 2024 00:00:00 +0000

Cloud security is often viewed as complex, but fundamental practices can dramatically improve your security posture. Here’s what I’ve learned from building secure cloud architectures.

Identity & Access Management

The foundation of cloud security starts with IAM. Too many organizations grant broad permissions “for convenience” which creates significant risk.

Least Privilege Principle

{
  "Version": "2012-10-17",
  "Statement": [{
    "Effect": "Allow",
    "Action": ["s3:GetObject"],
    "Resource": "arn:aws:s3:::my-bucket/*",
    "Condition": {
      "IpAddress": {"aws:SourceIp": "10.0.0.0/8"}
    }
  }]
}

This policy only allows GetObject from the internal network range, not from anywhere else.

Secure Cloudflare Tunnel + Nginx

Mon, 20 May 2024 00:00:00 +0000

A comprehensive guide to exposing self-hosted services securely using Cloudflare Tunnel and Nginx reverse proxy.

Why This Setup?

No need to open ports on your firewall
Automatic SSL/TLS encryption
DDoS protection from Cloudflare
Access control via Cloudflare Access

Architecture Overview

User --> Cloudflare --> Tunnel --> Nginx --> Service

Configuration Steps

Create a Cloudflare account and add your domain
Install cloudflared on your server
Configure the tunnel with your services
Set up Nginx as a reverse proxy
Configure SSL certificates

Nginx Configuration

server {
    listen 443 ssl;
    server_name service.example.com;

    ssl_certificate /etc/ssl/certs/cert.pem;
    ssl_certificate_key /etc/ssl/private/key.pem;

    location / {
        proxy_pass http://localhost:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}

Security Considerations

Enable authenticated origin pulls
Use Cloudflare Access for sensitive services
Implement rate limiting
Log all access attempts

Infrastructure on Ankit Maurya