Date: Tue, 21 Oct 2008 08:47:12 +0400 From: Roman Kurakin <rik@inse.ru> To: John Hay <jhay@meraka.org.za> Cc: "Leander S." <leander.schaefer@googlemail.com>, freebsd-ipfw@freebsd.org Subject: Re: IPFW + Portforwarding Message-ID: <48FD5ED0.2030909@localhost.inse.ru> In-Reply-To: <20081021040349.GA29232@zibbi.meraka.csir.co.za> References: <48FCF5DA.5060802@googlemail.com> <20081021040349.GA29232@zibbi.meraka.csir.co.za>
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John Hay wrote:
> On Mon, Oct 20, 2008 at 11:19:22PM +0200, Leander S. wrote:
>
>> Hi,
>>
>> I'm trying to set up something like a HotSpot. Goal is it to force
>> unregistred users to get redirected to the Captive Portalsite where
>> they'll be able to agree my licence therms and get some information ...
>> etc. ...
>>
>> So fact is I need an IPFW rule which forwards Port 80,443,8080 Traffic
>> to another Port i.e. 8080 --> where my Apache will already wait for
>> serving the Captive Portalsite back to the request.
>>
>> So I did read the man and saw something like the fwd rule and the Kernel
>> Option for it - so I added the option - rcompiled the Kernel and gave my
>> Firewall the following fwd rule in an extra script:
>>
>> ${fwcmd} add 01100 fwd ${LAN_IP},8080 tcp from ${LAN} to any
>> 80,443,8080 in via ${LAN_if}
>>
Try to make the rule stateful, eq add 'setup keep-state'. Also add some
logging in the rule
and add the last one additional deny with the logging.
> You have to catch it where it is going out and not in. Fwd only works
> when packets are out bound.
>
But how this works for me?
ipfw fwd 192.168.0.4,3128 log logamount 1000 tcp from 172.22.4.0/24 to
172.22.4.254 dst-port 3128 setup in via vr0 keep-state
rik
> John
>
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