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Help with Routing (imgur.com)

submitted 1 year ago by knaak@lemmy.world to c/selfhosted@lemmy.world

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I am not very experienced with networking and as I build out my services on prem I have come to this community for help and support.

I have done a lot of reading about subnets and masking and the like and I semi-understand how it works and what I want to do but I don't know how to actually do it.

Thanks to this community I have a OPNSense Router that I installed on a desktop computer where I purchased a 2x1gb NIC to install. I've learned how to open ports and how to NAT/forward even with reflections for my https local services.

I just can't figure this out. I drew my network topology and put it here: https://imgur.com/a/XY8V5Sl

My wired network is 192.168.1.0/24 meaning 255.255.255.0. My wireless is Google Nest Wifi which limits me a bit. It is using 192.168.86.0/24. The gateway for both networks is my opnsense router 192.168.1.1.

I want to create a route between 192.168.86.0/24 and 192.168.1.0/24. I believe one way to do it is to use 255.255.0.0 meaning /16 but I don't know where to make that change and since the Google Wifi uses its own DHCP, i am not sure I can change that properly.

My preference is to leave Google Wifi alone (its a piece a shit, by the way, don't buy it) and my expectation is that I can create a route in opnsense to 'bridge' the two different subnets.

Am i correct? If not, can you help me understand? If i am correct, can you guide me?

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[–] BrownianMotion@lemmy.world 2 points 1 year ago (6 children)

Well in Interfaces -> LAN go to where you set your static IP for opnsense and change that to 192.168.1.1/16. That should get you running. But the google device would probably need to be told that it is 192.168.866.0/16 as well so it can see the 192.168.1.0 subnet.

However it would probably be better to disable DHCP on the google device, but I don't know anything about them. (I read that on some you cannot disable it, so set the DHCP pool to 1 and then assign that IP to some mac address. Essentially stopping the google device from handing out that address).

If this is what you need to do, then on opnsense set up your DHCP pool to say 192.168.1.100-250. Then set the google device pool to 192.168.1.251-251 and then set a static lease in the google 192.168.251 to MAC: de:ad:be:ef:ca:fe.

(That wifi sounds like a shit device - maybe consider a tp-link or something more configurable)

[–] knaak@lemmy.world 2 points 1 year ago (1 children)

Yea, complete shit: https://www.googlenestcommunity.com/t5/Nest-Wifi/Changing-the-Domain-Name-Domain-Suffix/td-p/183313

[–] BrownianMotion@lemmy.world 2 points 1 year ago

Holy crap. Burn it with fire and make the switch.

A few weeks ago, I purchased a TP-Link AX53 for $200 AUD. Not the absolute bleeding edge for speed, but its WIFI6 does WPA3, mobile devices typically get 1Gb/s. More than enough for most use cases (Yes, you can get much faster but expect $$$$$)

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