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Old 04-06-2008, 01:06 AM   #1
genderbender
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Registered: Jan 2005
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iptables to redirect ip


Hello, I'm running a web server on port 80 (IP is 192.168.1.1) and have 2 computers connected viw wifi (192.168.1.2, 192.168.1.3). I want all the computers to hit the webserver before they get access to the internet, in other words if 192.168.1.2 wants to get to www.google.com he'll be redirected to the 192.168.1.1 webpage.

Whats the best and easiest way to do this, IPtables seems most feasible but I've no idea how

Thanks
 
Old 04-06-2008, 02:53 AM   #2
blackhole54
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The only way you can enforce the redirection (i.e. w/o the cooperation of the requesting computer) is to have your wireless router (or whatever is between these computers and the Internet) to do the redirection. I'm guessing that's not an option for you, but if it is, post back.

There are two ways for the requesting computers to do the redirection. One (which will work the same way on any OS) is to set up the browser(s) to use 192.168.1.1 as a proxy. One drawback to this solution is any user can change his own settings and defeat this.

The other option is to have the firewall redirect. This method will, of course, depend on the OS the computer is running. If the computer is running Linux, I believe the following rule will work.

Code:
iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.1.1

Last edited by blackhole54; 04-06-2008 at 02:55 AM. Reason: spelling
 
  


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