Troubleshooting Common Setup Issues

This document helps you identify and resolve common challenges during the setup and configuration of Medianova CDN. A smooth, optimized content delivery network (CDN) experience is crucial for both content providers and end users.

Configuring a Content Delivery Network (CDN) is a strategic move for optimizing content delivery and improving website performance. However, common mistakes in CDN resource configuration can undermine these goals. This guide highlights frequent errors and provides solutions to ensure a smooth CDN setup.

Website speed is paramount. Misconfigurations can reduce cache hit ratios and slow delivery. This guide covers common setup mistakes and shows how to avoid them.

SSL/TLS Certificate Configuration

• Issue: SSL-related errors or insecure connections.

• Troubleshooting steps:

  • Confirm that SSL/TLS is correctly configured in the Medianova Control Panel.

  • Ensure that the origin server supports the chosen SSL/TLS protocol.

  • Stay informed about the latest security standards and updates.

Setting Cache-Control headers

• Issue: Applying Cache-Control: no-cache to all files, which prevents caching and creates unnecessary uncached traffic.

• Troubleshooting steps:

  • Apply selectively: Use Cache-Control: no-cache only for files that must not be cached.

    • Excluded files: Cache-Control: no-cache

    • Other files: no special Cache-Control override

  • Avoid uncached traffic: Remove unnecessary headers so the CDN can cache content.

Website with Cookies

• Issue: Unintentionally sending cookies with static files, impeding CDN caching by default.

• Troubleshooting steps:

  • Configure CDN settings: Enable cookie ignoring in your CDN settings, if available.

    • Example: Navigate to CDN Resource: Click the CDN tab → CDN Resource → Caching → enable Ignore Set-Cookie.

  • Remove cookie headers: If the panel does not support this, remove Set-Cookie headers on cacheable files at the origin.

Setting the Expiration Time

• Issue: Incorrectly configuring cache expiry, potentially leading to a short caching period and high miss ratios.

• Troubleshooting steps:

  • Dashboard configuration: Set a longer cache expiration in the CDN dashboard.

    • Example: Navigate to CDN Resource: Click the CDN tab → CDN Resource → Caching → adjust Cache expiry.

  • Priority note: If max-age and Expires conflict, max-age takes precedence.

Web Application Firewall (WAF) Configuration

• Issue: Legitimate traffic being blocked (false positives).

• Troubleshooting steps:

  • Conduct a thorough review of WAF settings and rules to minimize false positives.

  • Collaborate with Medianova Support to fine-tune WAF configurations based on your application's requirements.

  • Regularly update and customize WAF rules to adapt to evolving security threats.

See Medianova IP Blocks.