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My brother is my neighbor and we are saving some money sharing internet, but I don't want to share anything else, just internet.

What I did is to pass a cable through the wall that connects his router —that has access to internet— to my router. I created my own wifi name and password.

Today my brother-in-law has been listening to online radios and I had the notification in my android phone telling me that someone was casting in a wireless sound system.

I checked my router entering its IP in the explorer url box and saw that someone "unknown" was connected to my network.

I would like anything connected to my wifi to stay in a different network, being not able to see what my brother is doing (and vice-versa)

How should I start?

riqui
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1 Answers1

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One way to get some isolation between your wired networks is for each of you to have your own dedicated router. The WAN port of each of your routers is wired to a LAN port of the ISP's router.

To the ISP router, there are only two clients, Router You and Router Brother. Each of the You and Brother routers are configured as normal for a router. They have their DHCP servers enables. They perform DNS caching. They have their WiFi on with your choice of SSIDs and credentials, different for each of you. When a request from your side is made, it is NAT'ed out of your router and into the common ISP router. There, it is NAT'ed again and presented to the wild Internet. Same for your brother.

There is no internetworking between you and your brother. You share an ISP connection.

Although anything is probably hackable, short of exploiting a bug in the router, neither of you can probe the other's network.

cmm
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