Bakshi;
input interface maybe invalid.
can you try this;
iptables -t nat -I PREROUTING -i wan_intarface -p tcp --dport 81 -j
DNAT --to 192.168.1.2:8080
iptables -A FORWARD -p tcp -m state --state NEW,ESTABLISHED --dport 81 -i wan_intarface -j ACCEPT
if this is failure, can you send yours active iptables rules ? (iptables-save> ipt_gw.txt )
On 03/16/2011 09:20 AM, J. Bakshi wrote:
Any clue please ?
On Tue, 15 Mar 2011 19:22:01 +0530
"J. Bakshi"<joydeep@xxxxxxxxxxxxxxx> wrote:
Hello Remzi,
Thanks for your kind response. Yes the forwarding is enable as I have it in my script
`````````````````
echo 1> /proc/sys/net/ipv4/ip_forward
`````````````````````
But no luck :-( here is the modified rule
iptables -A INPUT -p tcp -m tcp --dport 81 -j ACCEPT
iptables -A PREROUTING -t nat -i ${LAN_IFACE} -p tcp --dport 81 -j DNAT --to 192.168.1.2:8080
iptables -A FORWARD -p tcp -m state --state NEW,ESTABLISHED --dport 81 -i ${LAN_IFACE} -j ACCEPT
On Tue, 15 Mar 2011 15:16:18 +0200
Remzi AKYÃZ<linuxliste@xxxxxxxxx> wrote:
Hello,
forwarding is enable?
can you try this;
#sysctl -w net.ipv4.ip_forward=1
#iptables -A FORWARD -p tcp -m state --state NEW,ESTABLISHED --dport 81
-i ${LAN_IFACE} -j ACCEPT
On 03/15/2011 02:29 PM, J. Bakshi wrote:
Dear list,
Here is a port forwarding issue. I have a linux router which have two NIC; one facing WAN and the other facing LAN. IP forwarding is active and this box is working as a gateway. This box has LAN IP 192.168.1.1
There is another box (webserver) 192.168.1.2 within the internal network and the router box has port forwarding to access the webserver.
```````````````````````````
iptables -A INPUT -p tcp -m tcp --dport 81 -j ACCEPT
iptables -A PREROUTING -t nat -i ${LAN_IFACE} -p tcp --dport 81 -j DNAT --to 192.168.1.2:8080
iptables -A FORWARD -p tcp -m state --state NEW --dport 81 -i ${LAN_IFACE} -j ACCEPT
````````````````````````````
So within LAN I can access the 192.168.1.2 web server through 192.168.1.1:81 as port forwarding is there. But I can not access the same through internet. If I point at<domain-name>:81 throught internet ; the browser simply reports it can't connect to the service; though the other services running at that very server are quite accessible through internet. Have I missed something in my firewall rule ? Could anyone give any clue please ?
Thanks
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