Help with dialin server

[whenever]

Hi,
	I am having problem with a dialin server after upgrading to RH7.2, basiclly eth1 is connected to the internet and eth0 is masq local lan with private ips, running MonMotha's rc.firewall(iptables) script.  mgetty is monitoring /dev/ttyS0, I can call the modem and setup the ppp connection on ppp0, tcp/udp connections to eth0 and eth1 has no problem, ssh/web/ftp/smtp and such, but I can't get out to the internet, packet unable to reach beyond eth1.  The client computer's ip address is on the same subnet as eth0(private ip), the strange thing is the local lan has no problem getting out to the internet.  Do I have to include the ppp0 interface on the iptables? the subnet already set to masq out on eth1 in the rc.firewall script, does anyone know what am I missing here? It was working before the upgrade using ipfwadm.   here's the entry in /etc/ppp/options, hope that help on the troubleshoooting.

-detach
192.168.1.1:192.168.1.11
netmask 255.255.255.0
asyncmap 0
modem
crtscts
lock
require-pap
refuse-chap
login
proxyarp
ms-dns 192.168.1.1


192.168.1.11 is assign to the client from server 192.168.1.1, server also running bind/dns. 

thanks for the help