2 routers parallel in network

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scott.neel

Jul 13, 2018
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Hello,

For my company i am renting 2 units in the same building. The building has 1 internet connection per room. Every room is connected to the main router.

Within my units i have 1 router (per unit) of my own to create a personal network.
Is it possible to access all devices connected to the router in unit 1 from my other unit?

Here is a picture to show the setup:

router_setup.png


So i can setup the router in my first unit as 192.168.1.1 and in the second unit as 192.168.2.1

I would like to access router 192.168.1.1 from 192.168.2.1 and visa versa.

Thanks for the help
 
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failboat

failboat

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Feb 19, 2010
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Do any units have access to the main router. physically or admin access?

If it's locked up you could put a switch in the room and have the main router into the switch and then into both of your rooms. Then make your current routers into WAPs by disabling dhcp, only using the LAN ports, and moving the admin pages to your subnet.

If that's not secure, then you can use a VPN to connect them both. the NAT on each of your routers prevents the other guests from making inbound connections to it. You don't want to be on the same shared subnet as them. It's really not ideal to have potential unwanted parties upstream of you. They could try various man in the middle attacks on you if the main router has no client isolation. The main router should be protecting each user from another in any situation. It would be ideal for you to get your own public ip and your own edge device all locked up secure.
 
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scott.neel

Jul 13, 2018
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I don't have access to the main router because it is from the building i am renting for. I am also not able to pull a cable from unit 1 to unit 4.
I only have access to install the routers behind the ethernet plug from the wall.

If i plug my pc directly into the wall, i can see other devices from other units so i don't think it is protected.

Will VPN work in my case? And you have any idea how to set it up?
Thank you for your help
 
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failboat

failboat

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Feb 19, 2010
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Yes, I'd recommend running openvpn 256bit off of a dedicated computer/server. They are not very easy to configure. You may want to consider hiring out for it. This can also give remote access to your network so you can securely use the lan out of office.

If you don't want a client on every device a dedicated server in the "remote" unit to run it on the router so everyone on LAN goes through the VPN without each having a client. Cheaper routers can't handle VPN throughput which is why you will need another server. Xeon D is good or two E3 servers for a small office. a pro could size this for you and set it up.

It would save you alot of money if you could get the building to accommodate you.
 
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failboat

failboat

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Feb 19, 2010
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Another option is running all your server needs off the cloud and using a VPN to connect to it. This would be quite expensive. Just putting it out there as an idea. This puts all your network traffic on WAN, but services on AWS or which ever can scale to your needs.
 
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Alabalcho

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Jan 13, 2011
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Would't it be much easier if you contact your landlord, and ask him to plug Unit 1 and Unit 4 into your own router, which in turns plugs into the building' router?

Another option (which still requires landord' help): Get two pairs of "Ethernet splitters" - a small box which splits 4-pair Ethernet cable into two 2-pair cables. Kind of ugly, with inter-connect in the router room between the units.
 
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scott.neel

Jul 13, 2018
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Thanks for all the information.
I don't think it is possible to plug unit 1 and unit 4 into my router, i think only 1 cable goes to every unit and if i want to plug in unit 4 to unit 1, i don't have the cables for that.

I will ask the company where i rent, i hope they have a solution.
I really thought it was more easy to connect 2 routers parallel since they are connected to the same network
 
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failboat

failboat

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Feb 19, 2010
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It is easy, but only from the main routers access to the wires and modem. Workarounds will be costly.
 
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