Ketan's Musings » adsl http://ketan.padegaonkar.name Where he blogs about his eclipse musings Fri, 23 Jul 2010 16:03:25 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Port forwarding using IPTables http://ketan.padegaonkar.name/2007/11/07/port-forwarding-using-iptables.html http://ketan.padegaonkar.name/2007/11/07/port-forwarding-using-iptables.html#comments Wed, 07 Nov 2007 13:58:50 +0000 Ketan http://ketan.padegaonkar.name/2007/11/07/port-forwarding-using-iptables.html I’ve got a UT300R2U ADSL router that has a really bad web based UI that did not let me setup some basic port-forwarding rules.

Thankfully the router was a linux based router with telnet installed on it. I was able to log in using the admin user, and set the following iptable rules:


#iptables -I PREROUTING -t nat -p tcp --dport 8080 -i ppp_0_35_1 -j DNAT --to 192.168.1.11:8080
#iptables -I FORWARD -p tcp -d 192.168.1.11 --dport 8080 -i ppp_0_35_1 -o br0 -j ACCEPT
#iptables -I FORWARD -p tcp -s 192.168.1.11 --sport 8080 -i br0 -o ppp_0_35_1 -j ACCEPT

the IP address 192.168.1.11 is the webserver that’s hosting tomcat on port 8080.

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