need help with iptables Port forwarding

From: (-delusion-@securityfocus.com)
Date: 09/30/01 

From: <-delusion-@securityfocus.com> <delusi0n@bellsouth.net>
To: <focus-linux@securityfocus.com>
Subject: need help with iptables Port forwarding
Date: Sun, 30 Sep 2001 04:41:44 +0000
Message-Id: <20010930083930.SOGF3572.imf16bis.bellsouth.net@there>

hi, i just set up ip masquerading, so im usign my linux box as my router. I
have an internal box running a service that i need to make available to the
outside. the port is 5500 and the internal ip of the box is 192.168.0.11,
heres what i tried:

# iptables -t nat -A PREROUTING -i ppp0 -p tcp --dport 5500 \
        -j DNAT --to-dest 192.168.0.11

it goes through without any errors, but when i try to connect to the service
usign my external ip it says Host Refused connection. i also tried port
scanning for this port, and it doesnt find it. Please help me solve this ASAP.

Thank you in advance,
delusi0n

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