Well after messing with it straight 14 hours I found nothing but loss. In conclusion I declare OPNsense is not compatible with Realtek 8169 Network card (Hardware model is TP-Link 3269 i guess). It's extremely unstable. Also startup and installation process was like 10x slower than pfsense. After all I gave up on OPNsense, back to PfSense. Sorry to say goodbye. Maybe see you until I get better hardware.