(starting locally before going to the IPCop user list)

I know a few people out there run IPCop, so I thought I'd try the list
and see if anyone has any ideas.  I'm trying to set up a machine
running IPCop 1.4.6 to forward port 80 from red to green (why green?
no orange network. why? because the web server is the only thing on
the "green" side, so why waste a network card).  I set it up from
scratch, added my port forward through the web interface, nmap'd it,
and....nothing.  Just port 113 closed, which is the standard for
IPCop.  I re-installed, still nothing.  I compared to my home instance
of IPCop, even forwarded a port to green on that box just to prove to
myself that I could, and it worked fine on the home box.  So, in a
last ditch effort, I brought the firewall "inside" my main network,
assigned an internal IP to the red interface, and nmap'd that.  And
guess what?  port 80 showed open, just like it should.  Put it back to
the external IP and hung it back off the external network, and 80 went
back to "filtered".  Why, why, why?

some "before you ask" answers:
Is my ISP blocking 80? No, I'm on Nucleus, with a business class account.
Are my external IPs assigned correctly?  Yes, I already talked to
Nucleus tech support to verify ip/subnet/gateway, all is correct
(plus, I could browse out from the green network when I tried, just
can't get back in).

Any ideas would be great.  Thanks.
Ian

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