My Current setup is: ISP > n5386x CPE (Router#1) > WZR-HP-G450H (Router#2) running on openwrt 19.07
My plan is to bypass Router#1 configuration including DHCP, Firewall, etc and keep everything working on Router#2 which has Openwrt. (Basically need it for SQM)
Router#1 cannot make it into Bridge, it has only IP Passthrough.
If I enable IP Passthrough on Router #1 and plug it in Router#2 WAN port, it doesn't connect me to the internet. Although DHCP is enabled and WAN port is getting WAN IP.
If I connect the cable from Router#1 directly into the PC, I get connected to the internet with WAN IP which means IP Passthrough is working fine.
Since I am new in Openwrt and cannot see where is my problem is, please help me on the way I can operate this. Note that when I don't make Router#1 on IP Passthrough and connect the cable to WAN in Router#2, I get connected to internet however it is double-NAT which causes issues in ports and gaming in general.