route question

[James Simons <jsimons@ntinet.com>]

I'm runnong RH 7.2 connected to the Internet through a DSL line.  I have 
a router on the DSL part doing NAT and port forwarding.  I have set the 
router up to forward ports 21 and 80.   I have a linux box set up as a 
gateway between the router and the rest of my network for extra 
security.  It's runnong iptables and has done a hell of a job so far 
:-).  I have iptables specificly set to accept ports 21 and 80 on the 
INPUT, OUTPUT, and FORWARD chains.  

My route table looks like this

the route commands I have issued to the system are this
route add default gw 192.168.100.1
route add 192.168.100.0 ("external subnet")
route add 192.168.1.0 ("internal subnet")

When I go to grc.com and have my ports probed it tells me that port 21 
is running in stealth mode and that port 80 is closed.  They should be 
wide open!  I was wondering if I needed to do port forwarding with route 
on the linux box (don't think so) or if perhaps there is something that 
I'm totally forgetting to do.

Thanks,
James
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