Samba / internet iptables

Hi,

I'm having problems with my Samba / internet connectivity.

I have the following setup:

Router (192.168.0.1) --- eth0 (192.168.0.3) - eth1 (192.168.1.1) ---
Windows workgroup (192.168.1.2-10)

Once I'd set IP addresses on the Windows PCs (I'm using static IP
addresses), using the default FC7 IPtables setup, the Windows PCs
could see the internet, but not see the Samba share I'd created.
Adding 2 rules to the IPtables (manually, on the command line) solved
this problem. However, adding the following lines to /etc/sysconfig/
iptables file:


-A RH-Firewall-1-INPUT -p udp -m udp --dport 137 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 138 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 139 -
j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 445 -
j ACCEPT


has now made all the windows PCs see the Samba share on startup, but
none of the windows computers can see the internet. I can ping eth1
on the FC7 server, but when I ping eth0 (i.e. 192.168.0.3), I get

> Reply from 192.168.1.1: Destination host unreachable

From experience (and help from here!) I know that the /etc/
nsswitch.conf file might have something to do with it; the contents of
that file are:

passwd: files
shadow: files
group: files
hosts: files wins dns

bootparams: nisplus [NOTFOUND=return] files

ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files
netgroup: nisplus
publickey: nisplus
automount: files nisplus
aliases: files nisplus

My hosts file is:

::1 localhost localhost
192.168.1.100 server MyFCServer
192.168.0.3 routerConnect

I can post the rest of the iptables file as well if necessary

[I know I'm posting on here a fair bit at the moment, but I'm still on
a fairly steep learning curve!]

Thanks in advance for any help,
Chris