CDN hijacking occurs when attackers intercept or manipulate CDN traffic to deliver malicious content or steal user data. Solutions to prevent CDN hijacking include:
- HTTPS Encryption: Enforce HTTPS with strong TLS configurations to encrypt data between users and the CDN, preventing man-in-the-middle attacks. Example: Use TLS 1.3 with HSTS headers.
- DNS Security: Implement DNSSEC to validate DNS responses and prevent DNS spoofing. Example: Configure DNSSEC for your domain to ensure authenticity.
- Subresource Integrity (SRI): Add cryptographic hashes to external scripts and stylesheets to ensure they haven’t been tampered with. Example: Use
<script src="file.js" integrity="sha384-..."></script>.
- CDN Provider Security Features: Leverage advanced security features from your CDN provider, such as IP reputation filtering, DDoS protection, and WAF integration. Example: Tencent Cloud CDN offers WAF, DDoS protection, and HTTPS acceleration.
- Regular Monitoring and Auditing: Continuously monitor CDN traffic for anomalies and audit configurations for vulnerabilities. Example: Set up alerts for unusual traffic patterns.
- Token-Based Authentication: Use token-based access control to restrict unauthorized CDN resource requests. Example: Tencent Cloud CDN supports token authentication to prevent hotlinking.
For enhanced security, Tencent Cloud CDN provides features like HTTPS acceleration, WAF, DDoS protection, and IP reputation filtering to mitigate hijacking risks.