Questions about sharing a DSL connection between two networks

[Chris C.]

Hello,

I am planning to share a DSL connection between two networks (call
them network A and network B), by connecting a router for each network
into the DSL router. For example, I'll connect router A's WAN port
(for network A) and router B's WAN port (for network B) into the DSL
router's LAN ports.

I was thinking of setting the DSL router's address as 192.168.0.1,
network A's router address as 192.168.1.1, and network B's router
address as 192.168.2.1.

The DSL connection that I have provides us with one static IP address.

I'm confused as to what I should set for the following settings on
network A and network B's routers: IP Address, Gateway IP Address, and
DNS Server address.

I know that for the DSL router, I should fill in the information that
was provided to me from my ISP, but I'm confused as to what I should
put for the subnet router's (router A and router B) settings (for IP
Address, Gateway IP Address, and DNS Server address). Should I set
these to be the same as I set the DSL router? Or will the Gateway IP
Addresses for the subnet's routers be the address of the DSL router?

Any help or suggestions are greatly appreciated!

Thanks in advance!!

 

[harley morgan]

the question is can u use one router with the dsl, and can
the router a and b recognize each other by like trying to
share files. if you know that router a and b are talking
to each other then u dont hae to worry about setting up
the settings for anything but the dsl router, bc the dsl
router assigns each router an ip address, and the router
assigns the computer hooked up to it a separate ip
address. which generally is like 192.168.1.? for router a,
and router b: 192.168.2.?. which computer each computer
have a successive number in the sequence based on the
routers ip address. the dsl router should already house
the dns settings, and ip addresses, and the like need to
be put in, according to your ISP. my network at home, i
use a network hub instead of using multiple routers. but
im confused as to if you are using like a network hub or
another dsl router, if u r using more than 1 dsl router,
then i suggest putting the settings in for each router,
but if u have a network hub then u only have to mess with
the dsl router settings.

 

[Steven L Umbach]

I am not sure it would work because the routers may not allow private addresses
through the "wan" side to the "lan" side but what to try would be to give the wan
side of router A the IP address of something like 192.168.0.10 and router B to be
something like 192.168.0.20. Then routers for A and B would need to have their wan
side default gateway be 192.168.0.1. The lan side default gateways could be
192.168.1.1 and 192.168.2.1 as you planned if you use that network address. The
routers A and B could use the same IP addresses as the router connected to the
internet, though those addresses may change form time to time. I have never tried
this, so I can not guarantee that it will work. Hopefully others will also reply that
may have tried this or have another idea. Good luck. --- Steve

 

[Steven L Umbach]

"The routers A and B could use the same IP addresses as the router connected to the
internet" for dns is what I meant. --- Steve

 

[Chris C.]

I know that for the DSL router, I should fill in the information that

was provided to me from my ISP, but I'm confused as to what I should
put for the subnet router's (router A and router B) settings (for IP
Address, Gateway IP Address, and DNS Server address). Should I set
these to be the same as I set the DSL router? Or will the Gateway IP
Addresses for the subnet's routers be the address of the DSL router?

I just wanted to clarify my question:

My ISP has only provided one static IP address, and in the setup menus
for routers A and B, I have to enter an IP address that was assigned
to me by my ISP in order to connect to the internet. I wasn't sure
what to enter for routers A and B's IP address because my ISP only
provided us with one. And that address (I assume) will be entered for
the DSL router to connect to the internet.

I just wanted to clarify that I wasn't referring to assigning a local
IP address to routers A and B (such as 192.168.x.x)

Thanks again!

 

[Steven L Umbach]

Since you have only one IP address from your ISP, that will have to be configured for
the router connected directly to the internet/modem. For what you want to do, your
routers A and B would have to be configured with addresses on their "wan" side to be
on the same network as the " internet" router's lan side which you want to be
192.168.0.1. That is why I suggested the other two IP addresses on the 192.168.0.xxx
network. I believe the router will allow you to only assign private addresses to the
"lan" side of a router. Ideally, you would want to get two or more addresses from
your DSL provider and then a switch to the modem and then each router to the switch
and use separate public IP addresses for the wan side of the routers. --- Steve

 

[Chris C.]

Thanks for the replies! That sounds like the way to go, but, like you
suggested, I may not be able to assign private addresses to the WAN
side of router A and B. I don't have the equiment yet, so I just
wanted to make sure before I go out and purchase the two routers (A
and B)

I did some searching before posting, and some have suggested that the
way to split a DSL connection between two networks with only one
public IP address is to use the two routers as described above.

Just wondering if anyone has any experience setting up something
similiar to what I am trying to accomplish.

Any tips are greatly appreciated!!

Thanks in advance!