How to access IP address on different subnet?


I have limited knowledge when it comes to networks, so bear with me.

I have a tp_link router address is (main router, internet comes into this router)
i have a linksys E1200 address is wan port comes from tp_link lan port)

I have an nvr for security system. i want people that are on network to be able to login to nvr but not have access to any other devices that are on network.

Can someone help me set this up? i think i am supposed to setup static route on router but i dont know which router to setup static route on or which addresses to enter.

Thank you in advance. let me know if i have not made it clear enough what i am trying to do or if you need more information about my setup.
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Hello, What is the model number on the tp_link router, need to check it supports static routing. Let me know.


bguentherAuthor Commented:
Model number is tl-wr841n
It looks like it does support static routes
Henry DunnCommented:
Subnet mask is important in determining what network devices are a member of. Assuming a default mask of /24, it looks like you have 2 different networks.

Routers route traffic between networks based on routes, either static or dynamic. Since you have only 2 networks, I would say you need to configure a static route to bridge the two.

The basic gist of a static route is to define the network and how to get there. Your main router needs to be multi homed in both networks, so it needs to know both. When a client device wants to access something in the network, their network stack will perform and action called an AND. It's similar to the mathematical AND and it uses the subnet mask to determine whether the destination is local or remote. If local, it will send it on the line and layer two switching will ensure the traffic reached it's intended destination. If it's remote, your device will send it to it's default gateway. The default gateway will either know the network and send it on to that line or send it to it's own default gateway and so on until the final destination network is reached.

So, your gateway needs to be connected to both networks, and a static route configured between the two. That would be the most simple configuration.
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bguentherAuthor Commented:
ok that sounds like it should work. could you walk me through setting it up?

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bguentherAuthor Commented:
Sorry i have been very busy this path week. i will read through that and see if i can figure it out.
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