Solution
1. Please launch a browser and go to the setting page of router; the default website of ASUS router’s setting page is http://192.168.1.1.
2. The setting steps of enabling VPN Pass through as following.
(1) Click “Advanced Setting”
(2) Click “WAN”
(3) Click “DMZ”
(4) Select “Enabled” in item—“VPN PPTP Passthrough”
(5) Click button—“Apply” and wait to update setting completely
※ The steps of setting L2TP and IPSec are as above description. The default of VPN Pass through with PPTP/L2TP/IPSec is “Disabled”.