I am going to build a router with OPNSense (in Proxmox, on an HP thin client). I am stuck with setting up the networking (I have the Inel 4-port card). I don’t really know how to get started. Right now my device has one LAN cable going into it, and my consumer router is doing everything. I can set up a bridge for the other ports, but what IP address will I use for the LAN? I can’t use 192.268.0.1 because that will collide with my consumer router. Do I just take my consumer router offline while I am setting this up?I’d rather not because for sure I will get stuck and will want to look something up online. I guess I could use my phone but not the best when I am trying to see someone setting up something like this.
Silly question, I know, but I just can’t think of a clean way to get this going with minimal disruption. In a nutshell, what’s a good strategy for setting up and testing the OPNSense while it’s not actually doing any routing and then seemlessly drop it in and start working on it?
Your router’s IP can be anything. Choose any internal IP address on your subnet.
You can have 2 routers on the same subnet just make sure you disable DHCP on the new one while you perform the setup of everything else.
Then when you want to switch over, toggle on dhcp on the new router and replace the cables and you should be fine. You’ll know it’s working when you plug into it and get a default route of the new router.