[NTLUG:Discuss] IP NAT question

[Jay Urish]

I am trying to NAT 3 routeable IP's through a suse 7.2 box running kernel 2.4.4
The kernel is compiled with the advanced_ip_router flay set to Y.

I am using ipchains as well..

Here are more detailed specs

the box has 2 NIC's
eth0 is on the dirty side on a /27
eth1 is the clean side on a /24 (192.168.1.1)

What I want to do is have it so I can route through the box from a dirty IP to
a clean IP. I can add ipchains rules later.

for example:
66.88.190.227 > 192.168.1.100

I want to be able to ping that box , ftp to it etc...

I have 3 ip's that I want to do this with.

After spending 13 hours on this problem I haven't gained much ground.
I have read a zillion how-to's but still I can't gain any ground.

I can ping the dirty ip but all I get back is

Reply from 66.88.190.226: Destination port unreachable.
FYI .226 is the main ip of the box.

Has anyone done this before?
I am at my wits end. I need some direction--

TIA<

Jay Urish       KB5VPS  General Class ARO
Secretary Dallas Amateur Radio Club
Member: A.R.R.L, D.A.R.C, T.A.P.R, TX.VHF-FM.S