cannot access modem's config page

["H.S." <hs.samix@gmail.com>]

Hello,

I have an adsl modem connected to a linux box which acts as a router.
The router machine has three interfaces:
eth1: 192.168.1.2, connected to the modem
eth0: 192.168.0.1, the wired LAN (192.168.0.0/24) using a switch
ath0: 192.168.5.1, the wireless lan (192.168.5.0/24)

The modem's LAN ip address is 198.168.2.1. The modem is working in
bridge mode and when a connection is established, ppp0 is formed on the
router machine.

The iptables script that I have on the router machine does the
forwarding and nat. All works okay between the wired and wireless LAN
and the internet and also within the wired and wireless LAN.

The problem is that I can access the modem's web interface (on
192.168.2.1) only from the router machine and not from any other LAN
machine. Could somebody tell me what are the iptables rules needed to
make this happen?

This is on Debian Testing, running 2.6.18.


Thanks,
->HS