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406 Not Acceptable The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request. See Content negotiation. 407 Proxy Authentication Required The client must first authenticate itself with the proxy. 408 Request Timeout The server timed out waiting for the request.
406 Not Acceptable: The HTCPCP server is unable to provide the requested addition for some reason; the response should indicate a list of available additions. The RFC observes, "In practice, most automated coffee pots cannot currently provide additions." 408 Request Timeout: The HTCPCP server is unable to make tea for a timeout and forbidden ...
The OpenResty architecture is based on several nginx modules which have been extended in order to expand nginx into a web app server to handle large number of requests. [4] OpenResty aims to run Lua server-side applications completely in the Nginx server, leveraging its event model to do non-blocking I/O not only for client connections, but ...
488 Not Acceptable Here Some aspect of the session description or the Request-URI is not acceptable. [1]: §21.4.26 489 Bad Event The server did not understand an event package specified in an Event header field. [4]: §7.3.2 [6]: §8.3.2 491 Request Pending Server has some pending request from the same dialog. [1]: §21.4.27
A rule of thumb in determining if a reply fits into the 4xx or the 5xx (Permanent Negative) category is that replies are 4xx if the commands can be repeated without any change in command form or in properties of the User or Server (e.g., the command is spelled the same with the same arguments used; the user does not change his file access or ...
Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255 1 048 576: Private network Used for local communications within a private network [3] 192.0.0.0/24 192.0.0.0–192.0.0.255 256
The result of a scan on a port is usually generalized into one of three categories: Open or Accepted: The host sent a reply indicating that a service is listening on the port. Closed or Denied or Not Listening: The host sent a reply indicating that connections will be denied to the port. Filtered, Dropped or Blocked: There was no reply from the ...
502 Command not implemented 503 Bad sequence of commands 504 Command parameter is not implemented 504 5.5.4 Unrecognized authentication type [3] 521 Server does not accept mail [5] 523 Encryption Needed [6] 530 5.7.0 Authentication required [3] 534 5.7.9 Authentication mechanism is too weak [3] 535 5.7.8 Authentication credentials invalid [3]