I'm assuming you have 2 external IP address from your ISP. Your router uses one. The second one you assign to your PC with gateway = router's external IP address.
Yes,
[STORY]
ISP give me 2 IPs:
I can do this via standard switch device (not with my router) - connect ISP cable directly to one port on switch, connect cable from router (WAN port) to switch and connect cable from PC with external IP to switch. In this configuration I'll get 2 ISP IP's on my home "newtork" - separated devices.
[Questins]
How to do this when I have only Microtik router, how to assign only eth2(LAN) to eth1(WAN) ?
Regards,
Konrad.