I am new to OPi+2E & Armbian combo. When booted up, all outgoing traffic is fine (though speed is very slow) but no incoming traffic gets successful, e.g. SSH and Ping. I tried DHCP and Static IPs. I believe there is no firewall running. I connected to WiFi through armbian-config and WiFi also connected but no incoming on either interface. If I disconnect LAN cable while WiFi is still connected, incoming traffic works on WiFi. As soon as I connect LAN cable again, incoming stops working on both interfaces. Same behaviour on Raspbian and Armbian. Is there some firmware I need to update? Help will be appreciated.