In addition, application - layer VPN can successfully penetrate NAT and firewall.

此外, 基于应用层的VPN隧道可以成功穿透NAT及防火墙.

And realizes it on the RTEMS embedded system, forms the safe VPN gateway.

并在RTEMS嵌入式系统上实现了具有VPN功能 的防火墙, 从而构建了安全的VPN网关.

Algorithms described in this paper aims at automating this VPN discovery procedure.

本文描述的算法使VPN拓扑发现过程自动化.