http response codes

When analyzing network traces, sessions, or logs, you’ll see the following codes used within HTTP transactions. Knowing what they mean can be very helpful in figuring out what is happening. When you get a call that the intarweb is broken, ask them to tell you the little number that is on the web page…then wow them with your knowledge.

code meaning
100 Continue
101 Switching protocols
200 ok
201 Created
202 Accepted
203 Non-authoritative information
204 No content
205 Reset content
206 Partial content
300 Multiple choices
301 Moved permanently
302 Moved temporarily
303 See other
304 Not modified
305 Use proxy
400 Bad request
401.1 Unauthorized:login failed
401.2 Unauthorised:login failed due to server misconfiguration
401.3 Unauthorized:Unauthorized due to ACL on resource
401.4 Unauthorized:Authorization failed by filter
401.5 Unauthorized:Authorization failed by ISAPI/CGIapp
402 Payment required
403.1 Forbidden:Execute Access Forbidden
403.2 Forbidden:Read Access Forbidden
403.3 Forbidden:Write Access Forbidden
403.4 Forbidden:SSL required
403.5 Forbidden:SSL 128 required
403.6 Forbidden:IP address rejected
403.7 Forbidden:Client certificate required
403.8 Forbidden:Site access denied
403.9 Access Forbidden:Too many users are connected
403.10 Access Forbidden:Invalid Configuration
403.11 Access Forbidden:Password Change
403.12 Access Forbidden:Mapper Denied Access
403.13 Client certificate revoked
403.14 Directory listing denied
403.15 Client Access Licenses exceeded
403.16 Client certificate untrusted or invalid
403.17 Client certificate has expired or is not yet valid
404 Requested resource not found
404.1 Web site not found
405 Method not allowed
406 Not acceptable
407 Proxy authentication required
408 Request time-out
409 Conflict
410 Gone
411 Length Required
412 Precondition failed
413 Request entity too large
414 Request url too large
415 Unsupported media type
416 Requested Range Not Satisfiable
417 Expectation Failed
500 Server error
500.12 Application restarting
500.13 Server too busy
500.15 Requests for Global.asa not allowed
500-100 ASP error
501 Not implemented
502 Bad gateway
503 Out of resources
504 Gateway time-out
505 HTTP version not supported


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