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Date:      Sat, 12 Mar 2005 12:22:09 +0000
From:      Antony T Curtis <antony.t.curtis@ntlworld.com>
To:        Antal Rutz <arutz@mimoza.pantel.net>
Cc:        current@freebsd.org
Subject:   Re: Transparent proxy feature?
Message-ID:  <1110630129.77713.3.camel@pcgem.rdg.cyberkinetica.com>
In-Reply-To: <42321F57.9060708@elischer.org>
References:  <20050311223413.GA5126@mimoza.pantel.net> <42321E4F.9020904@elischer.org>  <42321F57.9060708@elischer.org>

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On Fri, 2005-03-11 at 14:44 -0800, Julian Elischer wrote:
> responding to myself to add more..
> 
> Julian Elischer wrote:
> > Antal Rutz wrote:
> >
> >> Hi,
> >>
> >> Nowadays I have to use a special firewall software ('zorp') but
> >> unfortunately it only runs on linux. the reason is that only linux
> >> has the feature (transparent proxying) to listen on/send packets 
> >> (sourcing)
> >> from other IP addresses than the machine has. (maybe with an extra kmod)

<snip>

> The proxy software need only do a getsockname() to get the sockaddr to use
> for the forward connection.
> 
> The ipfw rules need to be set so that the outgoing forward connection by 
> the
> proxy is not also captured :-)

Isn't the following option also required?

option IPFIREWALL_FORWARD


-- 
Antony T Curtis, BSc.                   UNIX, Linux, *BSD, Networking
antony.t.curtis@ntlworld.com            C++, J2EE, Perl, MySQL, Apache
                                        IT Consultancy.



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