vpn虚拟专用网络的一个开源搭建工具，可以按你的要求自己搭建一个虚拟专用网-vpn virtual private network to build an open source tool, you can request your own by creating a Virtual Private Network

This document provides a sample configuration of a Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) over ATM when Border Gateway Protocol (BGP) or Routing Information Protocol (RIP) is present on the customer s site.