Using iSeries As Router

Hi,



Maybe a dumb question.but when it comes to networking, I am pretty ignorant.





I recently got a new Wireless-N router (Linksys) to replace an older Belkin
Wireless-G router.




My old network looked like this:



- ISP Modem

To - Belkin Router





iSeries to Belkin Router

PC's to Belkin Router



By turning NAT off on the Belkin (wouldn't work with NAT enabled), I was
able to get to my iSeries using both an internal IP address and an external
IP address (from the outside world).

To achieve that, I defined a *DFTROUTE on my iSeries that pointed to the
Belkin router and then I created two interfaces, one with an external IP
address (that was a child of the ISP Modem's static IP address) and the
other interface was an internal IP address.



Worked great.





With my new Wirless-N router, I tried that same setup (only pointing the
*DFTROUTE to the new router IP address) and now I cannot get to the iSeries
through an outside IP address. I can still get to it internally (with a new
internal IP address interface), but not through the external IP address.
Turning NAT off on this router makes no difference in this setup.



I cannot figure out the right combination of settings on the new modem that
will allow me to point an external IP address to the iSeries such that I can
access it outside the network.



I also tried doing port forwarding and setting up the iSeries outside the
DMZ. Didn't work.



So. my question is. I have two Ethernet cards in my iSeries. I'm wondering
if I could set my network up so that the ISP Modem goes directly into my
iSeries (which would put it completely outside of the local router) and
then, using the other Ethernet card, pass all local PC traffic in and out
through the Wireless-N router and then through the iSeries and out to the
internet that way.



Is it possible to use the iSeries in this manner? In effect, I'd be turning
it into a router (sort of).



I don't even know what I'd have to configure on the iSeries to achieve this
or if it's even possible.





Anyone ever tried this?





Shannon O'Donnell