提供了一个在外网能够安全的访问内网Web主机，还能捕获所有请求的http内容，方便调试，甚至还支持tcp层端口映射。支持Mac OS X，Linux，Windows平台。(It provides a secure access to the Web host in the intranet, and captures all the requested HTTP content, facilitates debugging, and even supports the TCP layer por