Hi,
I watched this video on youtube:
https://www.youtube.com/watch?v=lLEfYIitXfA
I think that I got the purpose of it overall. It is about putting Zenarmor between your main router and your LAN without running another firewall like, e.g., OPNsense in which Zenarmor can be installed as a package/plugin. It is basically like setting your ISP router in bridge mode, allowing your favorite router/firewall to fully manage the WAN and the LAN side of your network.
However, there is still something that it is not clear to me, mostly because I still don't have a good understanding of computer networking.
Suppose that I have a Ubuntu machine with two network interfaces. I don't want it to be another router running on my LAN, since I already have a main router which I am happy with.
However, I want to install zenarmor on it (as that guy did in the youtube video) and let if filtering traffic of every device in my LAN.
Is the only way to achieve this is to bridge the two network interfaces (as the same guy did) and then, say, plug a switch into Ubuntu's LAN interface to which the other devices on my LAN are connected? Is it what they call transparent firewall? Has anyone already done it and help me figure it out exactly how it works?
Thanks
