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Hi,
I am not sure if this is the right forum for this, but I have to give a shot
since I have spent several days trying to figure out what to do...
So here is the setup:
I have ADSL-router (IP-address 10.xxx.yyy.153), which is a small hub. My ISP
gave me IP-addresses 10.xxx.yyy.154 - 10.xxx.yyy.158, thus I have 5 static
IP's.
I have a Linux server (with 2.4.6 and IP-tables and stuff) with two Ethernet
cards and two other machines. Here are all the addresses:
ADSL-Router: 10.xxx.yyy.153
Linux (ADSL-side): 10.xxx.yyy.155 eth1 (Has default GW 10.xxx.yyy.153)
Linux (LAN-side): 192.168.0.1 eth0
Machine#1: 192.168.0.100 (Has default GW 192.168.0.1)
Machine#2: 192.168.0.101 (Has default GW 192.168.0.1)
What I want to do is to make Machine#1 look to the ADSL router as IP-address
10.xxx.yyy.156 and Machine#2 look as 10.xxx.yyy.157.
I have been able make this setup work which means that I am able browse Web and
was able to play Starcraft in BNet from Machine#1 or Machine#2 but I still
cannot host a game. I tried to find out why by logging the packets and using
tcpdump, and I found out that packets that came to the Starcraft-host were
directed to INPUT-chain and not to FORWARD-chain as I was expecting them to.
Here are my scripts:
----------------------------------------------------------------------------
IT=/usr/local/sbin/iptables
# Make the Linux to respond to ARP (this setup didn't work without this!)
ip address add 10.xxx.yyy.156 dev eth1
ip address add 10.xxx.yyy.157 dev eth1
$IT -t nat -A POSTROUTING -o eth1 -j SNAT -s 192.168.0.100 --to 10.xxx.yyy.156
$IT -t nat -A POSTROUTING -o eth1 -j SNAT -s 192.168.0.101 --to 10.xxx.yyy.157
$IT -A FORWARD -j ACCEPT -i eth1 -d 192.168.0.0/24 -p tcp --dport 4000
$IT -A FORWARD -j ACCEPT -i eth1 -d 192.168.0.0/24 -p udp --dport 4000
$IT -A FORWARD -j ACCEPT -i eth1 -d 192.168.0.0/24 -p tcp --dport 6112:6119
$IT -A FORWARD -j ACCEPT -i eth1 -d 192.168.0.0/24 -p udp --dport 6112:6119
$IT -A FORWARD -j ACCEPT -o eth1 -s 192.168.0.0/24
----------------------------------------------------------------------------
Thanks in advance!
=====
- Riku
--------------------------------------------------------------------------------
Time is fun when you are having flies
- Kermit the Frog
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