How to make a Machine-In-The-Middle with a dual NIC PC in Linux?

I would like to use a Linux PC fitted with two network interface cards as a transparent bridge in order to capture (with wireshark or equivalent) all the traffic in both directions between my router/gateway and my main host (a Windows PC). The following figure illustrates what i'm talking about, my Linux PC will be inserted as a spy or MITM in the link: ![Machine in the middle ][1] Source: I know that using a managed switch with port mirroring is the most common solution for that but i'd prefer to try setting up this one in order to learn. I have already installed CentOS 7 on the spy PC and can I see my two NICs with an ip a command: eno1 and enp1s0. I would appreciate some help for the next steps please, since i'm not so familiar with Linux bridges (if bridging is the solution, you will tell).