potato: port forwarding question--

[will trillich <will@serensoft.com>]

we're trying to establish port forwarding so that a box internal
on our lan (192.168.1.2) can serve requests through the
debian/potato firewall, from 'out there'.

i had this working at some point -- but now i can't get
'ipmasqadm portfw' working. (i may have missed a step, but
/usr/share/doc/ didn't help ring any bells...)

"[PUBLIC_IP]" is, of course, the box's actual ip address:

	# ipmasqadm portfw -a -P tcp -L [PUBLIC_IP] 7890 -R 192.168.1.2 80

	# ipmasqadm portfw -ln
	prot localaddr        rediraddr       lport    rport pcnt  pref
	TCP  [PUBLIC_IP]      192.168.1.2     7890     80    10    10

well, it LOOKS like it's up, but--

	# nmap [PUBLIC_IP] -p 7890

	Starting nmap V. 2.12 by Fyodor (fyodor@dhp.com, www.insecure.org/nmap/)
	No ports open for host server ([public_ip])
	Nmap run completed -- 1 IP address (1 host up) scanned in 0 seconds

which is bolstered by the fact that if i try to connect to
public port :7890 from outside i get deafening silence (unable
to connect to host).

is there another step i've forgotten? i'm on potato 2.2.17 and
this was working earlier...

-- 
DEBIAN NEWBIE TIP #30 from Wayne Topa <wtopa@dmcom.net>
:
Are you seeing GIBBERISH after viewing a binary file on your
console (or in an xterm/rxvt window)? Add this to your ~/.inputrc
file:
	"\033[[A": "reset\C-M"
Now when you need a quick tty reset, just press F1 at the command
prompt. Try "info rluserman" for more options.

Also see http://newbieDoc.sourceForge.net/ ...