OpenVPN Site-to-Site VPN between Asus Merlin And Ubnt EdgeRouter

前言

Network Topology
Network Topology

RT-AC68U 使用PPPoE拨号上网,但是分配的IP是100.64.204.111, 看着像公网IP实际却是Carrier-grade NAT.

现在需要将RT-AC68U与一台在公网的EdgeRouter使用OpenVPN Site-to-Site连接起来,并在RT-AC68U端实现policy-based routing。
需要让RT-AC68U下的所有设备能访问EdgeRouter LAN的网络,并根据需求透过VPS访问指定互联网。

本实验参考下列文章:
Set up OpenVPN Site-to-Site on UBNT EdgeRouter Lite
EdgeRouter OpenVPN Connectivity Monitor
EdgeRouter 策略路由实现分析
EdgeRouter Policy Based Routing Using DNSMASQ IPSET

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OpenVPN Site-to-Site VPN between Asus Merlin And Ubnt EdgeRouter by @sskaje: https://sskaje.me/2017/10/openvpn-site-to-site-vpn-asus-merlin-ubnt-edgerouter/