[Coco] OT: Networking problem

[Steve Batson]

I see a couple of problems and I'm not a network expert.

1) The 192.168.x.x addresses are not routable which means they won't go out over routers and be accessible to anything on that network. They are for a local network.

2) Any device on say 192.168.0.x subnet can only talk to other devices on that same subnet, this includes the router 



Steve Batson
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On Nov 26, 2012, at 3:59 PM, Aaron Banerjee <spam_proof at verizon.net> wrote:

> This is a little off-topic, but is something people here probably have more experience with than I do.
> 
> I'm trying to "partition" off my network into multiple networks (e.g. for experimental purposes/parental control/etc).  I have a DSL modem and a router.  I thought the following configuration would work, but it doesn't.
> 
> 
>                      ----
>                      |   | <-------------------------->  {other device with static 192.168.1.n IP}
> {internet}  <-------> |   |   "1.2.168.1.x" network
>                      |   |    static IPs                ----
>                      |   | <--------------------------> | R |  "192.168.0.y" network (using DCHP from router)
>                      ----                               | O |
>                   DSL Modem                             | U | <------------> device 1
>                  192.168.1.1                            | T | <------------> device 2
>                                                         | E | <------------> device 3
>                                                         | R |
>                                                         ----
>                                            192.168.1.101 / 192.168.0.1
>                                                   netmask 255.255.0.0
> 
> Sorry about the '80s era graphics, but I didn't want to have to attach a file -- and besides, I'm from the '80s era (at least when it comes to computers).
> 
> 1.  I'd like to have the device 1,2,3 be able to "ping" or summarily see the modem.  I think this should work, but it doesn't.  What did I do wrong (or not do right)?
> 
> The router's address to its clients is 192.168.0.1.  It is statically set to 192.168.1.101 for purposes of the modem (which doesn't use DCHP).  The router then uses its own DCHP to doll out addresses to its client as it sees fit (in particular it starts with .100).
> 
> For experimental purposes, I took down the firewall completely in order to eliminate that as a source of the problem.  I'm getting a "no route to host" when I ping 192.168.1.1 from the devices on the "0" net (e.g. device 1, 2, or 3).  I don't have "ping" blocked at the modem or router just for good measure, and don't think I'm masking out the "1".  Even a few desperado attempts using DMZs didn't work, and eventually messed up my network until I could undo all that I had done.
> 
> I'm obviously missing something very simple and elementary and will probably kick myself when someone points it out to me.  I just haven't done this type of thing in a long while.
> 
> Thanks in advance for your help.
> 
> - Aaron
> 
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