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To: Dragan Matic <gekko,AT,eunet,DOT,yu>
Subject: Re: CIPE works, but there is routing problem I can't solve
From: Phil Scarratt <fil,AT,draxsen,DOT,com>
Date: Mon, 01 Sep 2003 10:41:11 +1000
Cc: cipe-l,AT,inka,DOT,de
Organization: Draxsen Technologies
References: <3F4FBA24.2040704@eunet.yu>

Sounds like IP forwarding is not enabled on the XP box. Not sure where this is - I know there's aregistry entry somewhere. Try googling for IP packet forwarding and see what comes up.

Fil

Dragan Matic wrote:
I need to connect two separate networks, both with assigned public IP
addresses, with Linux on one side and XP on the other side acting as a
gateways for cipe networking.

Net A          Router A    internet      Router B         Net B
192.168.10.--|192.168.10.5|-------------|192.168.1.1|---- 192.168.1.
             | 192.168.4.1|             |192.168.4.2|
                   CIPE 1.                   CIPE 2
               (Linux - RH9)              (Win XP Pro)

Gateway A and Gateway B CIPE interfaces see each other. Every host on
net A can see CIPE 2 interface as well as 192.168.1.1 address (they are
on the same computer). Gateway B can see every host on Net A. The
problem are the other computers on Net B, because they can't see CIPE 1
interface. So if I ping 192.168.4.2 (CIPE 2) from any host on net B they
can see it, but they can't see 192.168.4.1 (CIPE 1). Also, none of the
computers on Net A can see anything beyond 192.168.1.1.

Router B (Win XP)
- Router B is set up as default gateway for each computer on Net B
- Router B route for Net A is set up as:
route add 192.168.10.0 mask 255.255.255.0 192.168.4.1

Router A (Linux)
- Router A is set up as default gateway for each computer on Net A
- Router A route for Net B is set up as
route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.4.2

Obviously I am missing something, but what? I think problem is in XP,
can it work as a router this way, or I have to set something else up?
Tnx in advance.

Dragan









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-- Phil Scarratt Draxsen Technologies IT Contractor 0403 53 12 71


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