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Squid Proxy Status Codes

The TCP_code = requests on the proxy HTTP port (3128 by default)

The UDP_code = requests on the proxy ICP port (3130 by default)

If ICP Logging was disabled in the config file with the the log_icp_quaries directive, then surprise surprise ICP will not be logged.

The following result codes are from Squid version 2+

TCP_HIT
A valid copy of the requested object was in the cache.

TCP_MISS
The requested object was not in the cache.

TCP_REFRESH_HIT
The requested object was cached but STALE. The IMS query for the object resulted in "304 not modified".

TCP_REF_FAIL_HIT
The requested object was cached but STALE. The IMS query failed and the stale object was delivered.

TCP_REFRESH_MISS
The requested object was cached but STALE. The IMS query returned the new content.

TCP_CLIENT_REFRESH_MISS
The client issued a "no-cache" pragma, or some analogous cache control command along with the request. Thus, the cache has to refetch the object.

TCP_IMS_HIT
The client issued an IMS request for an object, which was in the cache and fresh.

TCP_SWAPFAIL_MISS
The object was believed to be in the cache, but could not be accessed.

TCP_NEGATIVE_HIT
Request for a negatively cached object, e.g. "404 not found", for which the cache believes to know that it is inaccessible. Also refer to the explanations for negative_ttl in your squid.conf file.

TCP_MEM_HIT
A valid copy of the requested object was in the cache and it was in memory, thus avoiding disk accesses.

TCP_DENIED
Access was denied for this request.

TCP_OFFLINE_HIT
The requested object was retrieved from the cache during offline mode. The offline mode never validates any object, see offline_mode in squid.conf file.

UDP_HIT
A valid copy of the requested object was in the cache.

UDP_MISS
The requested object is not in this cache.

UDP_DENIED
Access was denied for this request.

UDP_INVALID
An invalid request was received.

UDP_MISS_NOFETCH




SQUID HTTP status codes

000 Used mostly with UDP traffic. [Only used in SQUID?]
100 Continue
101 Switching Protocols
102 Processing [Only used in SQUID?]
200 OK
201 Created
202 Accepted
203 Non-Authoritative Information
204 No Content
205 Reset Content
206 Partial Content
207 Multi Status [Only used in SQUID?]
300 Multiple Choices
301 Moved Permanently
302 Moved Temporarily
303 See Other
304 Not Modified
305 Use Proxy
307 Temporary Redirect [NOT USED in SQUID]
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication Required
408 Request Timeout
409 Conflict
410 Gone
411 Length Required
412 Precondition Failed
413 Request Entity Too Large
414 Request URI Too Large
415 Unsupported Media Type
416 Request Range Not Satisfiable [NOT USED in SQUID]
417 Expectation Failed [NOT USED in SQUID]
424 Locked [Only used in SQUID?]
424 Failed Dependency [Only used in SQUID?]
433 Unprocessable Entity [Only used in SQUID?]
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
507 Insufficient Storage [Only used in SQUID?]
600 Squid header parsing error



More Squid info can be found at Squid's FAQ
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