General Troubleshooting

• Gathering information for troubleshooting sites
• Contacting Cloudflare Support
• Troubleshooting surges or spikes in web traffic
• Troubleshooting crawl errors
• Troubleshooting missing images
• Troubleshooting issues sharing to Facebook

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Website Under Attack

• Using Cloudflare Logs (ELS) to Investigate DDoS Traffic (Enterprise Only)

Restoring Visitor IPs

• Restoring original visitor IPs - Option 1: Installing mod_cloudflare
• Restoring original visitor IPs - Option 2: Installing mod_remoteip with Apache
• Restoring original visitor IPs: Logging visitor IP addresses
• How does Cloudflare handle HTTP Request headers?

HTTP Status Codes

• HTTP Status Codes
• 1xx Informational
• 2xx Success
• 3xx Redirection
• 4xx Client Error

Cloudflare Errors

• Troubleshooting Cloudflare 1XXX errors
• Troubleshooting Cloudflare 5XX errors

Performance

• Troubleshooting and optimizing site speed