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Using 2 Routers on 1 cable modem connection


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#1 bbunny123

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Posted 17 November 2010 - 07:03 PM

Hi -- Question: In our household we currently have a family computer & a small business computer sharing a router and our entire network was recently infected. Though I have set Parental/Access Controls (no P2P file sharing, etc), I'm wondering if it's possible to connect my business computer to another router behind the main router (since the business computer only needs access to a select few sites I'd like to deny access/filter all other web-addresses & ports to strictly limit connections on that machine -- we don't even use that computer for email mind you). Is this possible/practical, or do i need to get a seperate, dedicated line (which I would not prefer as our budget is a bit tight now)? Thanks.

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#2 computerxpds

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Posted 20 November 2010 - 12:48 PM

If you want to do what I do which is to have one router connected to the cable modem and then a second router connected to the first. Is that What you would like to do? I only do it because I have so many devices I need 2 to handle them all. I think that is completely practical. What is the specs of your current router?
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#3 bbunny123

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Posted 23 November 2010 - 11:44 PM

Yes, and thank for your reply. I'm going to buy 2 routers (thinking either D-Link or Linksys) and I want to have the first attached to the cable modem for the family (wireless transmission really) with basic security/hardwall configuration, and have the second router plugged into the first which will not have wireless and have a very restricted set of allowable IP addresses, blocking everything else.

Basically I want to set up a dedicated desktop for small-business purposes that only needs to access about 4 addresses as well as naturally allowing updates (no email either from this machine is needed). Is this a plausible security configuration? ie. if the family network is compromised will the second router be able to protect the business-purpose desktop or should I just get a second line? Thanks so much for your help.

#4 trebormuhaha

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Posted 24 November 2010 - 07:18 AM

i would buy 2 routers and 1 switch

plug the cable modem into the switch then plug the 2 routers into the switch much better topology i think

Edited by trebormuhaha, 24 November 2010 - 07:18 AM.

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#5 DDave64

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Posted 24 November 2010 - 11:22 AM

plug the cable modem into the switch then plug the 2 routers into the switch much better topology i think


I'm not sure if that would work. Especially if the ISP only furnishes one dynamic IP address. Each router will need to get an IP address for the WAN port from the cable modem to work properly.

If the ISP allows multiple IP addresses it may work but I don't think there will be any separation between the routers. They would most likely build dynamic routing tables and dutifully route traffic back and forth.

(since the business computer only needs access to a select few sites I'd like to deny access/filter all other web-addresses & ports to strictly limit connections on that machine --


It sounds like that would work but it seems to me you could accomplish the same thing just by configuring the firewall on the business computer.

Dave

#6 trebormuhaha

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Posted 24 November 2010 - 03:38 PM

that being the case you would require 3 routers
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#7 bbunny123

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Posted 30 November 2010 - 01:44 AM

Sorry for the delay in getting back. I'm confused by the last post though -- in what case would I need 3 routers? I know I can specify the MAC of my biz computer in the router and apply all my stringent rules to this one computer, but if the other computers sharing the router get compromised by some reprobate surfing porn or something, won't that also compromise my biz machine? I'd like to have some sort of solid separation between the biz machine & the others, preferably without the added cost of a whole new line installed. Maybe split the signal from the modem box? I don't know. I'm surprised there's not some sort of quarantine technology that can do this!




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