allow two network to see each other

Posted on 2003-03-26
Medium Priority
Last Modified: 2010-04-17

This is a bit of a lengthy question... please bare with me.

I have a DSL line at my home office, this line has two static IP assigned to it (say,, 200,100,1,2).

I connect the DSL to the DSL modem (provided by DSL provider), then to a switch.
From the switch, I connect to two router, each assign a static IP from DSL provider.
Then I set up a network behind each router (say, - 50, and - 200).
Within its own network, everything is working fine.  I can surf the 'net and set up forwarding to local network services like HTTP, FTP, etc.

But I can get machines on these two networks to "talk" to each other unless I use their DSL static IP.  I was hoping I can set up some sort of route so that computers on - 50 can directly "talk" to computers on - 200.

How can I achieve this?  Is this even possible?


Question by:javaexpert
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Accepted Solution

epylko earned 300 total points
ID: 8210814
The best way to do this is to re-address one router and its clients, or change the netmask.  If your current netmask is, both routers think all devices are local and won't forward any packets to get to other devices on

So, change one of the routers to as well as its clients and then put a static route on the router to point to the other router.  Also tell it to not NAT traffic destined for  Do the opposite thing on the other router.

With more specific information about the products I can probably give more detailed information.

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Expert Comment

ID: 8725666
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