I use the internet provider's modem/router only as a modem. I have connected the Asus Merlin router AC2900 (WAN port) to the LAN port of the modem. pppoe passthrough is activated in the modem, so the Asus router makes a second connection (pppoe). Everything works great and when I connect to Asus' wifi I can access the modem in 192.168.1.1 and the Asus router in 192.168.10.1 (I have changed the LAN address of the Asus). So far so good. Now, the VPN server is running on the Asus, and when I am using 4g and VPN I can access the Asus in 192.168.10.1 but not the modem in 192.168.1.1. Is there any solution in order to access both via VPN?