From owner-freebsd-questions  Tue Feb 27 14:57:12 2001
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Date: Tue, 27 Feb 2001 16:56:59 -0600 (CST)
From: Brennan Stehling <brennan@offwhite.net>
To: "G. Jason Middleton" <gmiddl1@gl.umbc.edu>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: ipfw: getsockopt(IP_FW_ADD): Invalid argument
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I just had this very same problem the other day.  It is due to not having
a kernel with the proper features.

When you build a custom kernel you need to add the following options.

options         IPFIREWALL              # firewall
options         IPDIVERT                # divert(4) sockets

After you reboot you should be able to add your divert rules to the
firewall.

If you need more info, here is a ton...

http://www.greasydaemon.com/cgi/udmsearch/gd.cgi?q=ipdivert+ipfw&m=any

Brennan Stehling - software developer and system administrator
  my projects: 
       home.offwhite.net (free personal hosting)
       www.greasydaemon.com (bsd search)


On Tue, 27 Feb 2001, G. Jason Middleton wrote:

> I get this error when i am tryign tio set up my firewall....i have it set
> to open...even when i try to use ipfw :
> /sbin/ipfw add 500 divert 8668 all from any to any via de0
> 
> i get
> 
> ipfw: getsockopt(IP_FW_ADD): Invalid argument
> 
> when i boot and the rc.conf it read stating the firewall should be open i
> get a couple of thos errors during boot time
> 
> any ideas?
> 
> Hope everyones day is going well!
> 
> Regards,
> 
> G. Jason Middleton
> 
> 
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