[Coco] OT: Networking problem

[Aaron Banerjee]

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