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Date:      Sat, 29 Jun 2013 09:50:15 +0300
From:      Sami Halabi <sodynet1@gmail.com>
To:        "Paul A. Procacci" <pprocacci@datapipe.com>
Cc:        freebsd-net@freebsd.org, freebsd-ipfw <freebsd-ipfw@freebsd.org>
Subject:   Re: DNAT in freebsd
Message-ID:  <CAEW+ogZ=a6LZavOtcb_egNWFQ8bJP0gzP6pc90tu1dcWC9K80A@mail.gmail.com>
In-Reply-To: <20130629002959.GB20376@nat.myhome>
References:  <CAEW+ogYp61U2zjicksYekSdfmLLZh5g9QM3GUg4n16ZbudVZtg@mail.gmail.com> <20130629002959.GB20376@nat.myhome>

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I think I was misunderstood...
Here is the situation i want to handle:
My box is a router that handles several /24 behind.
One of my links (em0) is connected to a private network 192.168.0.1 is me,
my neighbour is 192.168.0.2.
I want to make that any connection comes to 192.168.0.1  to go to ip
193.xxx.yyy.2 using specific public ip 84.xx.yy.1
And packets comming to my public 84.xx.yy.1 ip to be trsnslated as came
from 192.168.0.1 and sent to 192.168.0.2/or ant other ips
behind(192.168.1.xx/24).

Hope that makes it clearer, and I appreciate any help.

Sami
=D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A 29 =D7=91=D7=99=D7=95=D7=A0 2013 03:30=
, =D7=9E=D7=90=D7=AA "Paul A. Procacci" <pprocacci@datapipe.com>:

> > Hi, (sorry for sending again, the last email was with wrong subject)
> > I would like to perform a full dnat/snat as in iptbles in:
> > linux-ip.net/html/nat-dnat.html
> > How it can be done in fbsd, I use ipfw.
> >
> > I seeked natd man page but its translation, and thr proxy_rule is for
> > specefic port, not a whole transparancy.
> >
>
> Using in-kernel nat is probably a better choice IMHO.
>
> read `man ipfw(8)`
>
> The section labeled EXAMPLES has exactly what you need.
> Here is a snippet from the manpage to get you started:
>
> -------------------------------
> <!--snip-->
>
> Then to configure nat instance 123 to alias all the outgoing traffic with
> ip 192.168.0.123, blocking all incoming connections, trying to keep same
> ports on both sides, clearing aliasing table on address change and keep-
> ing a log of traffic/link statistics:
>
>     ipfw nat 123 config ip 192.168.0.123 log deny_in reset same_ports
>
> <!--snip-->
>
>            ipfw nat 123 config redirect_addr 10.0.0.1 10.0.0.66
>                            redirect_port tcp 192.168.0.1:80 500
>                            redirect_proto udp 192.168.1.43 192.168.1.1
>                            redirect_addr 192.168.0.10,192.168.0.11
>                                    10.0.0.100 # LSNAT
>                            redirect_port tcp 192.168.0.1:80,
> 192.168.0.10:22
>                                    500        # LSNAT
>
> <!--snip-->
> -------------------------------
>
>
> ~Paul
>
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