在总结分析应用层的几种防火墙穿透技术基础上，提出了反向

连接结合 HTTP 隧道的防火墙穿透通信方法，设计并实现了 HTTP 隧道

防火墙穿透通信模块。

-after reviewing and analyzing several technologies of

application-layer firewall penetration, this paper presents the firewall

penetrating technology based on HTTP-tunnel combining with reverse

connection, designs and implements a firewall penetrating communication

module of HTTP-tunnel.