HTTP 444 Connection: Close Error - Meaning & Fix
This status code indicates that nginx has terminated the connection without sending a response. It is used internally and only appears in nginx logs, not visible to clients. It serves to handle specific server-side conditions silently.
Main causes
Malformed request syntax that nginx cannot parse or process.
Requests that fail to meet specific security rules set in nginx configurations.
Suspicious patterns in requests that suggest potential security threats like SQL injection or cross-site scripting.
Excessive request rate (rate limiting) that triggers nginx to drop further requests from a client.
# Request example curl -X GET https://sandbox.oxylabs.io/ -H 'Accept: text/html' -H 'Accept-Encoding: gzip, deflate' -H 'User-Agent: Mozilla/5.0'
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Common fixes
Review the API documentation to identify all required precondition headers for your request.
Match header with the correct entity tag (ETag) in your request to ensure data consistency.
Ensure that all headers are correctly formatted and values are properly quoted as per the HTTP specification.
Use tools like Postman or cURL to test and verify that the headers are being sent correctly in your requests.
# Response example HTTP/1.1 444 Connection Closed Connection: close Content-Length: 0
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