Can I set up a Windows XP network with two computers, both behind routers?

I have two xp machines and two routers.  One of the routers is connected to the modem.  The first xp system and another router is connected to that router.  That second router has an xp machine connected to it.  Both can connect to the Internet. I've been trying to set up networking between the two computers but they don't see each other.  Is this because both computers aren't connected to one router?
Alan SilvermanOwnerAsked:
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bbaoIT ConsultantCommented:
are you saying the following network topology?

XP1 <-> Router1 <-> Modem1 <-> Internet <-> Modem2 <-> Router2 <-> XP2
Gary CaseRetiredCommented:
It's because the 2nd router is creating a different subnet.

Turn off DHCP on the 2nd router;   and set it's internal address to an address on the subnet of the 1st router.

Then connect the 1st router to one of its LAN ports (NOT the WAN port);  ... and then you'll be okay.

That will turn the 2nd router into effectively an access point (if it's wireless) or simply a switch (if you're not using  the wireless or if it's not a wireless router).

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☠ MASQ ☠Commented:
A router is designed to have multiple computers attached and group them into a network.  It does this by giving each computer it's own unique identity and usually "out of the box" this means using DHCP which is an automatic allocation of identities (IP addresses).  These all need to be in the same "group" for the computers to be able to see each other.

So yes, it sounds like connecting a second computer behind another router is your problem if each router is doing its standard job they are going to be handing out addresses but in different "groups" so the computers can't see each other.

Why have the second router?  All you need is a cable long enough to go from the first router to the second PC to get your computers networked together using the first router.

If you don't have the right cable you could alter the second router's settings so it just uses the addresses the first router is handing out.

If you plugged your second PC into the cable that goes into router #2 you should get both PC's talking to each other.

Need to understand a little more about why the second router is there - if it is connecting somewhere else that could change part of your answer.
Alan SilvermanOwnerAuthor Commented:
Why have the second router?
The client has the two computers in two different buildings, a house and non-attached cottage with ethernet passing underground through a pipe. I want to set up a backup from the main house (primary computer) to the cottage to have an off-premise backup. It worked before but then he wanted wireless in the cottage too. After I put in the second router I found the backup didn't work any more.
I'll be able to do it now.
Thanks to all,
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Windows XP

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