i recently installed red hat fedora-3 on my 733MHz dual CPU machine with two network cards. Internet works fine with eth0; eth1 is for local netwrok with a win2000 system. I like to set up Fedora 3 so that i can get access to internet from my win200 machine. I believe it's called IP Masquarading? is there any other way? if so, would anyone tell me the steps or lead to a website.
please, note that, the last time i tried to set up IP Masquarading on a Linux 7.3 following a book i bought, it completely ruined my IPTABLES file and i had to reinstall the OS.
I use Konqueror, for now, on fedora, and internet explorer on win2000 as browser.
any help will be appreciated. thanks.
TH

Yes it's masquerading or SNAT that you need.

1. create a file that will be your script, let's say /root/nat
2. ensure that ip forwarding is on

echo 1 > /proc/sys/net/ipv4/ip_forward

3. clean all rules

iptables --flush
iptables --delete-chain

4. Now you have a choice:

masquerade will work even if your external IP changes, SNAT will not. Unless you do advanced linux routing, that is not the issue here, masquerade is enough. So for masquerade type:

iptables -t nat -a postrouting -s [LAN_NETWORK_ADDRESS/LAN_NETWORK_MASK] -j MASQUERADE
for example:
iptables -t nat - a postrouting -s 192.168.0.0/24 -j MASQUERADE

5. type at the end of the file /etc/rc.d/rc.local this line:
/root/nat

it will make you masqerade work after reboot
-------------------------

5. Set up your interfaces on the router

/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
BROADCAST=[WAN_BROADCAST_ADDRESS]
IPADDR=[WAN_IP_ADDRESS]
NETMASK=[WAN_NETWORK_MASK]
NETWORK=[WAN_NETWORK_ADDRESS]
ONBOOT=yes

/etc/sysconfig/network-scripts/ifcfg-eth1 (the local one)
DEVICE=eth1
BOOTPROTO=static
BROADCAST=[LAN_BROADCAST_ADDRESS]
IPADDR=[LAN_IP_ADDRESS]
NETMASK=[LAN_NETWORK_MASK]
NETWORK=[LAN_NETWORK_ADDRESS]
ONBOOT=yes

for example:
DEVICE=eth1
BOOTPROTO=static
BROADCAST=192.168.12.255
IPADDR=192.168.0.1
NETMASK=255.255.255.255
NETWORK=192.168.1.0
ONBOOT=yes

--------------
6. set up gateway:

/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=your.host.name
GATEWAY=[WAN_GATEWAY_ADDRESS]

----------
7. reboot

thanks pave. that's a lot of work. lol. i'll try it out as soon as i can.