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Router behind a router - how to connect two networks? (feddit.de)

submitted 1 year ago by [email protected] to c/[email protected]

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Hello! As a complete beginner in home networking I am a bit lost with my problem. Maybe someone can help:

Setup: Internet socket in the wall -> Fritzbox-router -> Linksys router with OpenWRT and a VPN (NordVPN)

I have to Networks I can connect to, the Fritzbox-Network (192.168.178.) and the OpenWRT-Network (192.168.1.). Most PCs/Smartphones are connected to the OpenWRT-Network to be a bit more protected with the VPN. Some are connected to the Fritzbox.

Now two questions:

How can I connect those two networks so that I can e.g. ssh from 192.168.178.10 to 192.168.1.30?
Who is providing the DNS, when I connect a PiHole to the Fritzbox, set it as DNS-Server and then connect my PC to the other network, which is routing everything to NordVPN? Does NordVPN use its own DNS-Server?

What do I need to learn to understand my own network better?

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[–] [email protected] -4 points 1 year ago

I would recommend starting with tail scale. Tail skill will help you set up wire guard to connect your networks. And it'll work across a large diversity of network topologies..

Once you get things working with tail scale, then you can look at doing ethernet bridging, more advanced things. But they're going to be more fragile and depend more precisely on your topology