This article explains How to Build VPN Server on the ASUS RT-AC66U Wireless Router. Its management IP is 192.168.1.1.
To use the VPN server, you should follow these steps:
1. Enable the PPTP VPN server.
2. Set up the username and password for VPN client.
2. In the VPN Details tab, select "Both" in the Broadcast Support. Set the IP pool for client IP. (Maximum 10 clients, For example : 192.168.10.2 - 192.168.10.11)
4. Open the VPN connection program on your computer or smartphone.
5. Add a new PPTP VPN connection and the VPN server address is 192.168.66.244
6. If your WAN IP address is dynamic, please set the DDNS.