How to Analyze nginx Access Log

Your nginx access log contains a wealth of information about traffic, errors, and performance. Here's how to extract insights without installing any tools.

Step 1: Get your log file

nginx access logs are typically located at /var/log/nginx/access.log. Download a copy to your local machine.

Step 2: Open in GigaSieve

Drag the file into GigaSieve. The app will stream-parse the file and show you lines immediately.

Step 3: Find 5xx errors

Use the filter: 502 or 504. The Insights panel will show you the distribution of status codes.

Step 4: Identify top IPs

Check the Top Status Codes panel. If you see many 4xx errors from specific IPs, they might be bots or attackers.

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