Nat 端口转换自动　由内网到外网端口的映射　针对功能是５系列以上的路由器（支持ＵＰＮＰ功能的）,Nat port automatically convert to the outside from the inside network port mapping function is for more than 5 series routers (UPNP function support)

upnp源码，linux下局域网网路穿透用-upnp source code

VB6实现的UPNP，可自动在路由器上进行端口映射。(UPNP With Visual basic 6)