HTTP
विक्रेता एक्सटेंशन
523 Origin Is Unreachable
Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
जब आप यह कोड देखें
When Cloudflare's DNS for the origin fails to resolve.
कैसे ठीक करें
Verify DNS records in Cloudflare dashboard. Check origin server's IP address.
गाइड
Understanding HTTP Status Codes: A Complete Guide
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HTTP Redirects: 301 vs 302 vs 307 vs 308
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HTTP Caching: Cache-Control, ETags, and 304 Responses
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Choosing the Right HTTP Status Codes for REST APIs
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gRPC Status Codes: A Practical Guide
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Debugging CORS Errors: A Developer's Guide
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Debugging Timeout Errors: 408 and 504
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401 Unauthorized vs 403 Forbidden: When to Use Each
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Essential HTTP Security Headers
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Complete Guide to HTTP Methods: GET, POST, PUT, PATCH, DELETE
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Essential HTTP Headers Every Developer Should Know
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HTTP/2 vs HTTP/3: What Changed and Why
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How to Implement and Handle Rate Limiting (429)
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API Versioning Strategies: URL, Header, and Query Param
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Designing Consistent API Error Responses
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Debugging 503 Service Unavailable Errors in Production
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TLS/SSL Certificate Troubleshooting Guide
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OAuth 2.0 Flows Explained: Authorization Code, Client Credentials, PKCE
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JSON Web Tokens: Structure, Signing, and Common Pitfalls
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