Connecting two subnets

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raffaele181188

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Dec 2, 2011
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I have two routers in my office, each one having wireless extensions and its own DSL connection (don't ask me why :mad:)
So there are
router A, 192.168.1.0/24
router B, 10.8.2.0/24
I want machine on A subnet communicate with machine on B, so I guess I'll need some sort of physical connection (a cable? a new device?) and little configuration on each router. Router A and B are typical home router with wifi extension: they only have a WAN port, so I guess I won't be able to let them talk to each other simpy by plugging an Ethernet cable between two LAN ports, since the two routers are on different subnets. Can you tell me what I need and if this is a viable objective? (I mean, in terms of costs and easy of configure, since I'm not so skilled in tcp/ip and networking in general, even if I'm very keen in computer networking)

BTW, I'd like to use a dhcp server dinamically configuring a dns server. Is sufficient to configure 1 router to act as a dhcp relay?
 

zx10guy

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If you're not worried about network security between the two subnets, then you just need a physical router that just routes between the two networks WITHOUT doing any NATing. You need this if you want to maintain two DHCP servers which issue IP addresses on totally different scopes.
 

raffaele181188

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What kind of router do you suggest? I mean, typical home routers won't be enough, afaik
Is it possible to do this kind of routing with a PC and some hardware expansion? I mean, two network cards or something like this. I already have a Linux box with daemon services, I could add a network card and use it like a router to contain costs, because I think that a professional router -even low end- capable of doing this is above 250$

I want to use just one DHCP server, properly configured. Obviously, one router will be instructed to be a dhcp relay, forwarding all dhcp requests to the other subnet
 

zx10guy

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Some SOHO routers do support this design. You just have to ensure there is a check box to disable the SPI firewall and a check box to disable NATing.

If you're using a SOHO router as a DHCP server then setting up a DHCP relay isn't going to help. You can't define more than one DHCP scope.
 
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