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Old 06-02-2004, 09:29 AM   #1
slack_baby
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Registered: Feb 2004
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Iptables -- Port Forwarding


i am using Slackware with IPTABLES latest version ..i have a webserver(192.168.0.3) inside my lan and i am forwarding my external traffic(say 213.130.x.x static IP) at 80 to my internal webserver at the same port

i use the following rule for it

$IPT -A FORWARD -p tcp -i ppp0 -d 192.168.0.3 --dport 80 -j ACCEPT
$IPT -t nat -A PREROUTING -p tcp -i ppp0 -d 213.130.x.x --dport 80 -j DNAT --to 192.168.0.3


its working perfectly and forwarding all traffic 2 my internal IP of other internet users

but the problem is that i cant browse my website on internal server (192.168.0.3) from any other computer on LAN

can u guys tell me where am i doing wrong

Regards

SlackBaby
 
Old 06-02-2004, 09:50 AM   #2
maxut
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Registered: May 2003
Location: istanbul
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your web server and local are located in 192.168.0.0/24 network?
if it is so i think it wont work.

if your webserver and local network are in different networks, i think u can do that with followings:
iptables -t nat -A PREROUTING -s local_net/subnet -d 213.130.x.x -p tcp --dport 80 -j DNAT --to 192.168.0.3
iptables -t nat -A POSTROUTING -s 192.168.0.3 -d local_net/subnet -p tcp --sport 80 -j SNAT --to linux_local_net_interface_ip
 
Old 06-02-2004, 10:14 AM   #3
slack_baby
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thankx maxut
i will try it
 
Old 06-03-2004, 02:29 PM   #4
bagira
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Registered: Dec 2003
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Can you reach your webserver by using the ip address, not the URL? Ensure, taht the URL is resolvable via DNS.
/bagira
 
  


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