I have a RH 7.2 computer, with iptables set up for IP masquerading and ip_dynaddr and ip_forward both turned on. (ip_forward is turned on in /etc/sysctl.conf and ip_dynaddr is turned on by doing a echo 1 > /proc/path/to/ip_dynaddr automatically everytime the computer starts.)
I have two NICs, eth0 is currently plugged into my network, and eth1 currently doesn't have anything plugged into it.

I also have a 802.11b Linksys Router/WAP, and I need to be able to access my connection wirelessly.

I plug my cable modem into eth0 (haven't tried it yet), and then would I plug eth1 into the WAN port on my router, or the Uplink port on my router?

Also, I have this line in iptables to forward the ports:

iptables -t nat -A PREROUTING -p tcp -o eth0 -dport 21 -j DNAT --to-destination 192.168.1.101

192.168.1.102 is my Linux box to use as a router, and 192.168.1.1 is my Linksys router/WAP.
Am I going to forward the ports directly from my Linux router to the computer I want them to go to, or will I need to forward them from my Linux router to my WAP and have that forward them to the computer they should reach?

If there's anything i've forgotten to do please let me know, and thanks for your help!

normal port, uplink is used from hub to hub

[quote]
Also, I have this line in iptables to forward the ports:

iptables -t nat -A PREROUTING -p tcp -o eth0 -dport 21 -j DNAT --to-destination 192.168.1.101
[quote]
ok so this is going to grab any outgoing ftp commands and route then back to the 192.168.1.101 box. Is that what you want?

if you have a masqeraded connection already all you really need to do is setup the gateway settings on your wireless machines to point towards the linux gateway. The routers typically have at least two network interfaces a wired WAN port, maybe wired lan ports and of course the wireless ports. So it may be easier just to set up the wan port to point to the linux box, and setup the wired land and wireless addresses to be in a different address range (maybe 192.168.2.0 or whatever) and let the router translate the adresses as it goes.