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Initial steps with OPNSense (lemmy.world)

submitted 10 months ago by skipmorrow@lemmy.world to c/selfhosted@lemmy.world

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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?

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[–] Petter1@lemm.ee 2 points 10 months ago* (last edited 10 months ago)

Plug your phone into the pc and choose to trust the PC. This should share your mobile internet with your PC

I use it all the time, when I distrohop on my laptop with a wifi card that needs to download b43 from the internet before WiFi works 🤪

Definitely unplug existing router, else you may end up with a doubleNAT.. I have a physical opnsense (without wifi antenna) plugged between my IPS router which in modem mode and another proprietary router which acts as bridge and wifi access point.