Re: Routing and setup questions for IPMasq and real IPs

["Bob T. Kat" <bobkat79@charter.net>]

Forgive me for showing my unwillingness to change but in ipfw/ipnat you
could use rdr to redirect ports on the real ip addy's to specific
machines on the inside, but since your cable service gives you more than
one ip addresses you should use ifconfig aliases in conjunction with
bimap to get better results, bimap creates a static map between
addresses, but I'm not sure how you go about it using ipmasq or iptables
to accomplish the same thing, diagram below:

INET <-eth1 64.24.72.112-> Linux Router <-eth0-> NAT <-192.168.1->
     <-eth1 64.24.72.113-> Linux Router <-eth0-> bimap <-192.168.1.3->

                 both routers are the same box above

Just a couple of ideas, Bob T. Kat

 "When everyone's out to get you, paranoia's just good thinking!"
-- WKRP's Dr. Johnny Fever

-----Original Message-----
From: luci-discuss-owner@luci.org [mailto:luci-discuss-owner@luci.org]
On Behalf Of Damacus
Sent: Monday, March 11, 2002 1:34 PM
To: luci-discuss@luci.org
Subject: Routing and setup questions for IPMasq and real IPs

Hey there,

It's been a long time since I've posted to this list.  The forward about
WOW
boxes and such made me remember a question I had.

I have a cable modem with 2 IPs.  I'd love to, instead of having the
cable
modem on the uplink port of my hub, have it connected to my 486 w/ 2
NICs.  If
I only needed IPMasq, I'd be fine, since I've been doing that for ages.

My twist is that I also want another machine on the network to have a
real IP
from Insight as well.

So, the network would be like:

INET <-eth1-> Linux Router <-eth0-> NAT <--- 192.168.1 ---> {assorted
comps} 
                           <-eth0-> real IP comp

Am I overlooking an easy solution for getting the second machine with a
real
IP (the first machine with a real IP being the router itself) to route
thru
the other Linux box?

Also, there's no guarantee that the real IP of comp2 with be on the same
netblock as the real IP of the router.

Thanks,
Dam


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