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Author Topic: Port forwarding with iptables?  (Read 10823 times)

Offline MiG-15

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Port forwarding with iptables?
« on: November 04, 2003, 03:24:54 PM »
i want to forward, for example port 82, to 192.168.1.20 behind my router when it receives the port request from my outside ip....  any help on the rule. i tried PREROUTING in the nat table, but it didnt work, maybe i did it wrong...
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Offline Ricky

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Port forwarding with iptables?
« Reply #1 on: November 04, 2003, 03:32:25 PM »
Have enabled the following??

Code: [Select]
echo 1 > /proc/sys/net/ipv4/ip_forward
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Offline MiG-15

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Port forwarding with iptables?
« Reply #2 on: November 04, 2003, 03:34:29 PM »
yup, i have all the forwarding and masquerading working fine, i have a cable modem shared to my lan, but i want to forward ports to certain computers in my lan
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Offline jayakrishnan

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Port forwarding with iptables?
« Reply #3 on: November 13, 2003, 11:35:00 AM »
[code]#!/bin/bash

echo 1 >/proc/sys/net/ipv4/ip_forward

iptables -t nat -A POSTROUTING -s 192.168.0.0/255.255.255.0 -d 192.168.0.0/255.255.255.0 -j ACCEPT

iptables -t nat -A POSTROUTING -s 202.88.186.76/255.255.255.0  -j ACCEPT

iptables -t nat -A POSTROUTING -s 192.168.0.0/255.255.255.0 -o eth0  -j SNAT    --to-source 202.88.186.76



This may help. this is what i use on my gateway server
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