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CloudFront & WAF Case Study

Implemented a comprehensive security solution using Amazon CloudFront and AWS WAF to protect web portals and sensitive content while preventing unauthorized access, OWASP threats, and bot attacks.

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Securing Web Portals with Edge Protection

CloudFront & WAF Integration

About The Customer

A government organization operating two critical online platforms: the official website with public-facing information including news, announcements, and internal communications, and a recruitment portal for job openings and applications. Both platforms rely on Amazon S3 for storing and serving static content including PDFs, images, JavaScript, and CSS files. The organization required scalable, secure solutions to serve this content safely while maintaining high availability and protecting against cyber threats.

The Security Challenge

The initial deployment stored static content directly in Amazon S3 buckets accessible to the public internet. This architecture presented multiple security risks including potential data exposure, vulnerability to OWASP Top threats, automated bot attacks, and abusive traffic patterns that could impact service availability. The organization needed a solution that could protect both portals consistently while maintaining high performance and implementing scalable security policies.

Manual security management proved insufficient for handling diverse threat vectors and required a centralized defense mechanism that could scale without compromising performance or user experience.

Multi-Layer Security Strategy

By implementing CloudFront as a secure distribution layer combined with AWS WAF protection, a robust defense mechanism was created at the edge. This two-pronged approach eliminates direct S3 access while filtering malicious traffic before it reaches origin servers, ensuring high-performance content delivery with comprehensive threat protection.

Assessment

Identified security vulnerabilities in existing S3-based content delivery without protection mechanisms against public access and threats.

Architecture Design

Designed comprehensive security solution integrating CloudFront distributions with AWS WAF rules for threat protection at edge locations.

Implementation

Deployed CloudFront with Origin Access Identity (OAI), configured AWS WAF with managed rules, rate limiting, and geographic restrictions.

Security Hardening

Eliminated direct S3 access, implemented multi-layered threat protection, and established comprehensive logging and monitoring.

The Security Solutions

CloudFront Distribution

Fast, secure content delivery network with Origin Access Identity (OAI) preventing direct S3 bucket access, ensuring all content flows through the security layer.

AWS WAF Protection

Web Application Firewall with managed rule groups for SQL injection, XSS protection, rate limiting, GEO-blocking, and bot control at edge locations.

Integrated Logging

Comprehensive CloudFront and WAF logs enable full observability, threat analysis, and compliance reporting for security audits and investigations.

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Insphere implemented a comprehensive security architecture protecting web portals through strategic integration of CloudFront and AWS WAF. This solution eliminates security vulnerabilities while maintaining high-performance content delivery.

Architecture Components:

  • CloudFront distributions configured for both portals
  • Origin Access Identity (OAI) implementation restricting S3 access exclusively to CloudFront
  • Modified S3 bucket policies permitting access only through CloudFront with OAI credentials
  • AWS WAF WebACL with comprehensive rule sets protecting both portals consistently

AWS WAF Rule Configuration:

  • AWS Managed Rule Groups protecting against SQL injection, cross-site scripting (XSS), and common vulnerabilities
  • Rate limiting enforcement (1000+ requests per 5 minutes per IP) preventing DoS and brute force attacks
  • Geographic restrictions limiting access traffic to prevent unauthorized access from outside regions
  • Bot control mechanisms filtering automated abusive traffic while allowing legitimate user access
  • Custom rules adapted to specific business requirements and threat landscape

All user traffic flows through CloudFront edge locations where AWS WAF rules filter threats at the network edge before reaching origin S3 buckets. This architecture provides multi-layer protection: edge location filtering reduces latency for legitimate users, WAF blocks malicious traffic, and CloudFront with OAI ensures no direct S3 exposure. Requests that pass all security checks are processed by S3 with minimal latency due to geographic distribution of edge caches.

Comprehensive logging at both CloudFront and WAF levels provides complete visibility into traffic patterns, attack attempts, and user behavior for security analysis and compliance reporting.

Security Outcomes

Threat Prevention:

  • Malicious traffic filtered at edge locations before reaching BSF infrastructure
  • OWASP Top threats blocked through managed rule groups and custom security policies
  • Bot attacks eliminated through behavior analysis and rate limiting controls

Access Control:

  • Direct S3 bucket access eliminated, forcing all traffic through security layers
  • Geographic restrictions ensure only authorized traffic reaches BSF portals
  • Origin Access Identity ensures secure, authenticated communication between CloudFront and S3

Performance & Availability:

  • Edge location caching provides fast content delivery across India
  • DDoS protection through CloudFront and WAF ensures service continuity during attacks
  • Unified solution for both portals reduces operational complexity

Observability & Compliance:

  • Complete logging enables threat analysis and incident investigation
  • Full traceability supports compliance requirements and security audits
  • Centralized security management simplifies policy enforcement across both portals

By implementing CloudFront and AWS WAF, BSF successfully transformed its security posture, protecting critical portals while maintaining high-performance content delivery and ensuring compliance with security standards.

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