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I have a RH 7.3 box running iptables 1.2.5a, and it's not or seems not to be
forwarding udp ports.
A different fw/router setup (Freesco 0.2.8) was used and sucessfully
forwarded the ports I needed.
I have attached my script for those who feel inclined. ;-)
The required ports needed are 5198 and 5199, both udp to a WindowsXP box.
Thanks in advance for any help,
Cheers,
Nick
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#!/bin/bash
IPT=3D"/sbin/iptables -v"
$IPT -F
$IPT -F -t nat
$IPT -t nat -A PREROUTING -d xx.xx.xx.xx -p udp --dport 5198 -i =
xx.xx.xx.xx -j DNAT --to-destination 192.168.1.2
$IPT -t nat -A PREROUTING -d xx.xx.xx.xx -p udp --dport 5199 -i =
xx.xx.xx.xx -j DNAT --to-destination 192.168.1.2
$IPT -A POSTROUTING -t nat -s 192.168.1.0/24 -j MASQUERADE
$IPT -P FORWARD ACCEPT
$IPT -A INPUT -s 127.0.0.1/32 -d 127.0.0.1/32 -j ACCEPT
$IPT -A INPUT -s 192.168.1.254/32 -d 0/0 -j ACCEPT
$IPT -A INPUT -s 192.168.1.2/32 -d 0/0 -j ACCEPT
$IPT -A INPUT -p icmp -j ACCEPT
$IPT -A INPUT -p tcp --syn -j ACCEPT
$IPT -A INPUT -p udp -j ACCEPT
$IPT -A FORWARD -i eth0 -j ACCEPT -m state --state =
NEW,ESTABLISHED,RELATED,INVALID
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