Transparent proxy gateway machine and working method thereof

The invention discloses a transparent proxy gateway machine and a working method thereof. A virtual network bridge is provided with a proxy server and a proxy client; a hook function hooking is mounted at the position of a kernel protocol stack check point of the network bridge, and a hook function hooking is mounted at the position of a kernel protocol stack check point of the network bridge; a hook function (hook location) is mounted at a check point (output) of a kernel protocol stack of the network bridge; a hook function hooking captures and processes a message from an actual client, points the message to a port of a proxy server, reputs the message into a protocol stack and then sends the message to the proxy server, the proxy server receives the message and then carries out service auditing on the message, the auditing message is handed over to the proxy client to be sent out, and the proxy client sends the message to the proxy server. A message sent by a proxy client is captured by a hook function, th