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Date:      Tue, 4 Oct 2005 13:16:04 +0800
From:      "Foo Ji-Haw" <jhfoo@nexlabs.com>
To:        "K Anderson" <freebsduser@comcast.net>, <freebsd-questions@freebsd.org>
Subject:   Re: Need help: fwd on ipfw
Message-ID:  <013b01c5c8a2$b8f57b80$c801a8c0@nexpc>
References:  <010a01c5c89a$f4234c80$c801a8c0@nexpc> <004b01c5c8a0$59001f70$0c64a8c0@opteron>

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Hello Mr Anderson,

So, the story is that the newer versions of 5.x comes with forwarding
disabled, hence the inability to to ipfw add fwd?

Ok, will definately give it a try. Thanks for being a better Googler than
me!

----- Original Message ----- 
From: "K Anderson" <freebsduser@comcast.net>
To: "Foo Ji-Haw" <jhfoo@nexlabs.com>; <freebsd-questions@freebsd.org>
Sent: Tuesday, October 04, 2005 12:59 PM
Subject: Re: Need help: fwd on ipfw


>
> ----- Original Message ----- 
> From: "Foo Ji-Haw" <jhfoo@nexlabs.com>
> To: <freebsd-questions@freebsd.org>
> Sent: Monday, October 03, 2005 9:20 PM
> Subject: Need help: fwd on ipfw
>
>
> Hi all, I really need your help on this if you can...
>
> I am trying to put set up port forwarding on my machine. So far the usual
> 'add allow' and 'add deny' rules work perfectly. The most important rule
> which bugs me is the 'add fwd' rule, which the snippet below shows:
> ipfw add fwd 192.168.0.4,80 tcp from 10.10.10.0 to any 80
>
> When I try to enter this on the command line, I get the following error:
>  ipfw: getsockopt(IP_FW_ADD): Invalid Argument
>
> I tried researching the web. Some mention the error only upon recompiling
> kernels. But I am using the standard 5.4 product release as-is. My
firewall
> rules in rc.conf are as follows:
> firewall_enable="YES"
> firewall_logging="YES"
>
> I also have this line in dmesg:
>  ipfw2 initialized, divert disabled, rule-based forwarding disabled,
default
> to deny, logging disabled
>
> I see that 'rule-based forwarding' is disabled. Is this what caused the
> error? How can I enable it? I can't find the details on the Handbook.
> -----------------
>
> I did a google search on your message and found something. Here's a snip
of
> it.
>
> options IPFIREWALL
>  options IPFIREWALL_DEFAULT_TO_ACCEPT
>  options IPFIREWALL_VERBOSE
>  options IPFIREWALL_FORWARD
>
>  if you don't add them to your kernel, forwarding in ipfw will  be
disabled.
>
> Here's the URL.
> http://archives.neohapsis.com/archives/freebsd/2005-01/0089.html
>
> Hope that helps.
>
> ~Mr. Anderson
>
>
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