General Flow Description:
一般流程描述：
②The Gateway's firewall rules mangle the request to redirect it to a local port on the Gateway. When that's the done, the Gateway provides an HTTP Redirect reply that contains the Gateway ID, Gateway FQDN and other informations
网关的防火墙规则将这个请求重定向到本地网关的端口上。当做完这个工作，网关提供一个HTTP重定向回复，包含了Gateway的ID，Gateway的FQDN以及其他的信息。
③The Client does his request to the Auth Server as specified by the Gateway, see Login Protocol
用户向认证服务器发出认证请求
gw_id=[GatewayID, default: "default"]
gw_address=[GatewayAddress, internal IP of router]
gw_port=[GatewayPort, port that wifidog Gateway is listening on]
url=[user requested url]
④The Gateway replies with a (potentially custom) splash (login) page
网关返回一个（可以是自定义的）splash（也称作“登录”）页面
⑤The Client provides his identification informations (username and password)
用户提供他的凭据信息，比如用户名和密码
成功认证的话，客户端将会被重定向到网关的自己的web页面上，并且带有一个 认证凭据（一个一次性的token），内容比如
⑦The Client then connects to the Gateway and thus gives it his token
用户就是用获取到的凭据访问网关
⑧The Gateway requests validation of the token from the Auth Server, see Client Protocol【见登录心跳】
网关去认证服务器询问token的有效性
⑨The Auth Server confirms the token
认证服务器确认token的有效性
①②The Auth Server notifies the Client that his request was successful
认证服务器通知客户请求成功，可以上网了。